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To be honest, I found it a bit pedestrian and the continuity geek in me is a bit annoyed with some bits.

Sigh. Okay, here we go.

The opening Star Trek Universe sequence features the old scow used in this movie as well as a mirrored version of the Star Trek logo, referencing Philippa Georgiou’s Mirror Universe origins and the plot’s connections to the MU.

Aeschlyus was a playwright of Ancient Greece often considered the father of tragedy. The full quote is actually, “The anvil of justice is planted firm, and fate who makes the sword does the forging in advance.”

The opening scene takes place in the Terran Empire, the Mirror Universe counterpart of the Federation, although exactly where (or when) is not specified.

San was first mentioned in the DIS novel Die Standing as a friend of the younger Giorgiou, and then subsequently seen in flashbacks in DIS’s third season. We know little about him except that Giorgiou saw herself standing over his body and she believed she was dead (DIS: “Terra Firma, Part 2”).

This version of Giorgiou’s rise to power, by participating in a Hunger Games-esque event and murdering her family, is different from the “official” version seen in DIS: “Terra Firma, Part 1”, where Giorgiou, as a peasant girl, is said to have driven back a Klingon invasion single-handedly. Why precisely the Empire chooses its Emperor like this I leave it for my fellow Daystrom researcher to ponder.

Control was the name of a rogue computer system used by Section 31 that attempted to gain sentience to destroy all organic life in the galaxy in DIS Season 2. It was destroyed in 2258, so the name was given to another Section 31 operative which served the same purpose.

The unredacted text reads:

PHILIPPA GEORGIOU

PRIORITY CLEARANCE REQUIRED

The subject is EMPEROR Philippa Georgiou, former ruler of the TERRAN EMPIRE She’s an established threat and tyrant with a vast history of calculated atrocities, against her people as well as others.

Located in a PARALLEL UNIVERSE with the highest criminal population in recorded history. After an unexpected event, thought to have been around circa 2257, Georgiou was brought to our universe. Starfleet lost contact after a short time with Section 31.

There’s some fragmentary text visible in the close-up, “Recently spotted using an alias”, “located outside federation space, where we are tracking”, “new black market threat.” Section 31 lost contact with Giorgiou because, like the rest of Discovery’s crew, she was transported to 3188 (DIS: “Such Sweet Sorrow, Part 2”).

The starmap, like all starmaps from DIS on, is based on Geoffrey Mandel’s *Star Trek: Star Charts”, but with some alterations. One thing I spotted is the existence of a demilitarized zone around Chin’toka - but smaller than the one depicted in Star Charts which circa 2378 or so.

Georgiou’s location is near Hupyria (where the species of Maihar’du, Grand Nagus Zek’s servant, hails from). While not marked on the map, it is in proximity to Ferengi space as well.

The Treaty of Ka’Tann was negotiated the Vulcan ambassador V’Lar in the 21st or 22nd Century (ENT: “Fallen Hero”). This is the first time we have details of it forbidding Federation entry beyond the borders delineated by the treaty. Known states in that part of the Galaxy include the Talarian Republic, the Cardassian Union, the Tzenkethi Coalition, the Ferengi Alliance and the First Federation (TOS: “The Corbomite Maneuver”). As pointed out to me, this might explain why we never saw these species that much during the TOS era.

But that being said, we can see Starbase 17 (two of them, in different locations!), Starbase 25 and Deep Space 3 across the treaty line, and a few places Kirk and Pike’s Enterprise did visit, including Sarpeidon (which shouldn’t be there since it got blown up when its sun went nova in TOS: “All Our Yesterdays”), Gideon (TOS: “The Mark of Gideon”), Gamma Trianguli (TOS: “The Apple”), Galen (SNW: “Children of the Comet”) and Kiley (SNW: “Strange New Worlds”). There’s also Maxia, where Picard’s Stargazer was lost in 2355. So it’s all a bit of a muddle as far as production art is concerned.

The Stardate is 1292.4, at a space station called the Baraam. This is a TOS-style stardate, but back then stardates were pretty much random, and given the state of stardates these days, tells us absolutely nothing about when this is set

Virgil is a Cheronian (TOS: “Let That Be Your Last Battlefield”), specifically of the ruling half-white class (white on the left side), who hold the half-black class in contempt. Cheronians are extremely long lived (Bele was chasing Lokai for over 50,000 years), but were assumed to have been extinct since 2268, casualties of a civil war which wiped out Cheron’s population.

Quasi is a Chameloid, a shape shifter whose species first appeared in ST VI as a prisoner on Rura Penthe, a Klingon prison planet. Like the other Chameloid, his irises are amber and don’t change when he shape shifts.

Melle is a Deltan, a species known for their extreme sensuality which most other species find irresistible. Those serving (officially) in Starfleet have to take an oath of celibacy so as not to take advantage of sexually immature species.

Giorgiou suggests Vulcans never laugh, which is a generalization because it doesn’t take into account v’tosh ka’tur (Vulcans without logic, first appearing in ENT: “Fusion”), who eschew arie’mnu (passion’s mastery). She also suggests he lost his mind during pon farr, the Vulcan mating frenzy (TOS: “Amok Time”).

Rachel Garrett first appeared in TNG: “Yesterday’s Enterprise” as the Captain of the USS Enterprise-C, which was destroyed with few survivors during the Battle of Narendra III in 2344. Given that this is her younger counterpart, and that she appeared in her 40s in 2344, this would place the events of Section 31 in the mid 2320s, some 860 years in the past since Giorgiou entered the Guardian of Forever seeking redemption in DIS: “Terra Firma, Part 2”. Her presence on the team appears to be official, so that means Section 31 at this point in time is still operating as part of the Starfleet chain of command, unlike by 2374 (DS9: “Inquisition”).

Part of the reason Giorgiou did this was to stave off her impending death because of her separation both in time and universes between her rightful location in the Mirror Universe c. 2257. 2325-ish is still nearly 70 years separated from her rightful time, although that’s not as bad as 8.5 centuries and she’s obviously she’s dealing with it well.

“Where fun goes to die” is also the nickname given by the crew of Pike’s Enterprise to First Officer Una Chin-Riley and Security Chief La’an Noonien-Singh (SNW: “Spock Amok”).

Fuzz, a Nanokin (first species appearance), drives a Vulcan body much like the Teselecta in Doctor Who’s Series 6.

According to the readout, Minosians are a thriving, technologically advanced humanoid civilization allegedly from Minos Korva, and ruled by a High Council called the Minosian Sway. They also are arms merchants whose motto is “Peace Through Superior Firepower”.

Minos Korva is best known as a planet the Cardassians wanted to annex in 2369 (TNG: “Chain of Command, Part II”). However, production art in that episode suggested that the Class-M planet in that system was uninhabited when the USS Berlin surveyed it in 2343, and it was later annexed into Federation territory. The map seen here shows Minos Korva in proximity to Betazed, as it is in Star Charts.

Section 31, however, makes Minos Korva host to a thriving civilization of arms dealers, equating them with the Minosians of TNG: “The Arsenal of Freedom” (who had the same motto). Those Minosians were from the planet Minos in the Lorenze Cluster and were destroyed by the very weapons they were trying to hawk by 2364. So once again it’s a bit of a muddle.

Much like how Ro and Geordi somehow don’t fall through the floors of Enterprise in TNG: “The Next Phase”, Georgiou’s phase pod has the same effect despite her being otherwise out of phase.

San mentions that Giorgiou could have created something beautiful, which suggests this scene takes place before she was replaced by her future self in “Terra Firma, Part 1”.

Alok Sahar says he was born in the 20th Century and was alive during the Eugenics Wars. However, as we know now from SNW: “Tomorrow and Tomorrow and Tomorrow” the Eugenics Wars no longer took place in the 1990s but in the 2020s instead thanks to time agent tampering. He was baseline human but augmented as a child much like Julian Bashir was (DS9: “Doctor Bashir, I Presume?”). Did I say muddle?

Georgiou’s titles, “Her most Imperial Majesty, Mother of the Fatherland, Overlord of Vulcan, Dominus of Qo’noS, Regina Andor, Philippa Georgie Augusus Iaponius Centarius”, were first mentioned in DIS: “Vaulting Ambition”.

An ion storm, a perennial hazard in Star Trek, was the cause of Kirk’s foray into the MU in TOS: “Mirror Mirror”, as well as part of the confluence of factors that caused the Narada to split off the Kelvin Timeline (ST 2009). An anomaly allowing passage between universes reminds me of the overarching plot of LD’s final season.

The Crescent Nebula doesn’t show up in Star Charts but does in this movie’s starmap. It is in the same approximate place as the Tong Beak Nebula (DS9: “Children of the Empire’).

The collapsing Terran Empire described by Mirror Dada Noe is consistent with the conquest of the Empire before 2370 by the Klingon-Cardassian Alliance of the MU (DS9: “Crossover”).

Terbium is 65 on the period table and first mentioned in TNG: “Manhunt”. The metal reacts with water, giving off hydrogen.

Curse your sudden but inevitable betrayal! But wait, if San died before 2257, how does he still look so young? LD comes to the rescue: since we saw during Season 5 that people from different time periods can enter through the portals. It’s possible that San just found a portal from 2257 (or thereabouts) to 2324 (or thereabouts).

Georgiou performs percussive maintenance on the scow to get it going, something Jankom Pog was fond of in PRO.

The lack of shields and weapons locks in a nebula is long established in Trek lore dating back to the Battle of the Mutara Nebula in ST II. Generally, one needs shields to be down to transport through them, although there are known workarounds (TNG: “The Wounded”).

Garrett identifies the toy as coming from a “Droom planet”. Coincidentally or not, Droomplanet is a learning platform from India for storytelling to kids. This is the first mention of Droom technology, terrenium or tomohite.

Control is portrayed by Jamie Lee Curtis, who co-starred with Michelle Yeoh in Everything Everywhere All At Once.

Turkana IV was the home planet of Tasha Yar, the first Security Chief of Picard’s Enterprise-D, who died in 2364 (TNG: “Skin of Evil”). While civil unrest and secession from the Federation would lead to chaos and Tasha escaping from the colony around 2353, that collapse wouldn’t start until around 2339.

If we’re going to take that last shot literally, Baraam is warp-capable. We wouldn’t see warp-capable space stations until the 32nd Century (Federation headquarters, the Pax-class USS Federation, in DIS: “Coming Home” ).

The title is similar to the infamous Season 2 clip show TNG: “Shades of Grey”, written due to a writer’s strike at the time.

D’Erika is eating wing-slug rolls. Orion wing-slugs were mentioned by Lwaxana Troi in TNG: “Ménage à Trois”, and offered on a menu in the Shipyard Bar in Star Trek 2009. In beta canon they are said to be native to the Rigel system.

The Stardate is 59376.9 - by TNG reckoning that makes it 2382 (as also reckoned using Naomi Wildman’s age last episode), and Cerritos is at Targalus IX. One of the banners being displayed says “No Money No Problems”, an allusion to the song “Mo Money Mo Problems” by the Notorious B.I.G.

Boimler appears to trying to grow facial hair, probably inspired by his parallel counterpart from last episode. He’s calling his tips “Bointers”. He is addressed as Commander even though his rank remains LT-jg, presumably because he’s in command of this away team.

The shuttle Sequoia, named after the California National Park like all Cerritos shuttles, was damaged in LD: “No Small Parts” and has been under repair since LD: “Strange Energies”.

The Blue Orions are House Azure now, and a blazzard is a kind of domesticated Orion bird with reptilian features. Tendi says Orions haven’t used sailships in hundreds of years. Bajoran lightships used solar sails as far back as the 16th Century (DS9: “Explorers”), and R’ongovian ships also used solar sails for ceremonial purposes (SNW: “Spock Amok”).

The Orion sailship doesn’t have inertial dampeners, and neither did the Bajoran lightship. Inertial dampeners are only critical at FTL speeds, and solar sails are not meant for that. However, like Sisko’s Bajoran lightship, the Orion sailship does appear to have gravity plating.

Sarium krellide is a material used in power cells or in explosives (TNG: “In Theory”), and also powered Starfleet combadges (PRO: “Observer’s Paradox”).

Phlox kept a Pyrithian Bat as part of his menagerie on the NX-01 (ENT: “Flight or Fight”, et al.).

“It is possible to do everything right and still get your away team kidnapped by the corporate elite,” is a paraphrase of Picard’s “It is possible to commit no mistakes and still lose,” from TNG: “Peak Performance”.

On Hysperia, they keep dragons for pets and call their warp drives “dragonsbreath engines” (LD: “Where Pleasant Fountains Lie”).

T’Lyn appears to have added herself to the cartoon squiggles of the others on the Sequoia’s hatch.

Boimler tells Mackler to “turn away from the mountain”. The Black Mountain is a spiritual battleground in the afterlife (LD: “We’ll Always Have Tom Paris”) which Boimler has seen when he died briefly (LD: “In the Cradle of Vexilon”).

Assisting T'Lyn in demolishing Sequoia is Goodgey, Badgey's good twin from LD: "A Few Badgeys More".

The title is Spanish for “Two Little Hills”, and aside from a literal description of the episode’s plot, reminded me of the song “Dos Oruguitas” (Two Butterflies) from the movie Encanto. A similar title was LD: "wej Duj", Klingon for "Three Ships".

The collector’s (Yorif by the closed captioning) ship is a Zibalian freighter (TNG: “The Most Toys”), and the collector himself is of the same unnamed species as Palor Toff from that episode, which also appeared in LD: “Reflections”. He has Hupyrian guards (TNG: “The Nagus”, et al.). Tendi’s holographic disguise is that of a Heliian woman, the species to which Aquiel belonged (TNG: “Aquiel”). 

Seen in the collection is a Risian horgh’an (TNG: “Captain’s Holiday”), a Veltan lust idol (called a sex idol in “The Most Toys”), next to a broken Bajoran Reckoning Tablet (DS9: “The Reckoning”). Apparently, Orions lived in childhood slime dungeons. Yorif uses a ST II design phaser and claims his ornate facial piercing is “prescription”. 

The LD title has the 3D effect that was applied to TNG’s title which appeared only in Season 5. The ever-crowded battle in the title sequence is joined by Apollo’s hand (TOS: “Who Mourns for Adonais?”), which grabs the Borg cube, a Tholian ship drawing its web (TOS: “The Tholian Web”) and V’Ger (TMP), complete with its sound effects.

Mariner is playing a game of Vulcan kal-toh with T’Lyn. Boimler’s Fleet magazine, aside from the “30 Under 30” feature, also highlights “Klingon Kouture: Blood is the New Black” (an allusion to Orange is the New Black, which also starred Kate Mulgrew), as well as “Q Who? The Continuum Awaits”(alluding to TNG: “Q Who?”). It also mentions “Treknomics”, which is an out-of-universe term used to refer to Star Trek economics. The cover also somewhat resembles the official Star Trek Explorer magazine published by Titan Comics. It is issue No. 47, a recurring number and in-joke in Star Trek. 

Naomi Wildman was born on Voyager in 2372 during its sojourn in the Delta Quadrant, the half-Ktarian half-human daughter of Ensign Samantha Wildman who was pregnant when she came on board. This dates this season around 2382. Tendi mentions it’s been “months” since the end of Season 4. 

Worf encountered a quantum fissure in TNG: “Parallels”, which sent him on a journey through several parallel realities, including parallel Enterprises. D’Erika says that the Orion warship (later we find out it’s a medical frigate) dates from the time of the Great Plague over 300 years prior. Roger Korby’s claim to fame was his translation of medical records from Orion ruins that revolutionized immunization techniques (TOS: “What Are Little Girls Made Of?”), but I always imagined the ruins to be older than a few centuries. 

It was established in “Parallels” that quantum signatures differ from universe to universe. In this case, the parallel that Cerritos is in exhibits only a .327% variance. Among the differences in hair (and in Otherford’s case, cybernetic augmentations), the parallel Billups is King (where our Billups rejected the throne) and has Hysperian accessories over his uniform, like Worf used to wear his sash over his. 

We finally find out that Mariner is her middle name, so she was born Beckett Mariner Freeman. She went by "Becky" when living on Starbase 25 (LD: "An Embarassment of Dopplers") and her father still uses that name (LD: "Grounded").

The globes at the rear of the Orion frigate are like those spinning at the rear of a D’Var type Orion scout ship (TOS: “Journey to Babel”, SNW: “Those Old Scientists”). Blue-skinned Orions (actually light green) appeared only in TAS and were the result of coloring problems in the animation (Hal Sutherland, the director, was colorblind, also explaining why TAS tribbles are pink). Also, the odd pronunciation of “Orion” by the blue-skinned Orions here (“OR-ee-on”) comes from TAS: “The Pirates of Orion”, the mistake being due to an absence of a pronunciation guide.

Captain Becky says “there’s no interpersonal conflict allowed on my ship!” which was Roddenberry’s edict for TNG. Mariner also mentioned that people weren’t supposed to have conflict in LD: “Strange Energies”. Becky also uses a riding crop - in LD: “First First Contact” Mariner said she didn’t want a new captain because potentially they could be “some weirdo with a riding crop”. That was likely an allusion to Captain Styles (ST III) using a swagger stick. 

As she goes to replace Mariner, Becky uses the sarcastic Vulcan salute first seen in LD: “Moist Vessel”. We find out that the parallel Captain Freeman ended up at the infamous Starbase 80 (first mentioned in LD: “Terminal Provocations”). 

The Blue Orions say they are laughed at for their “ridiculous uniforms”, which were a product of TAS design. As Parallel Boimler goes to take his seat as Acting Captain, he does a reverse Riker Maneuver out of the conn chair. 

At the bar next to Ransom is a bottle of Cardassian kanar (DS9: “The Marquis, Part II”). In front of Boimler is a raktajino mug seen in DS9, in reality a Highwave Hotjo 16 oz. Travel Mug.

The title was first used in the context of the Progenitors in TNG: “The Chase” when Picard remarked, “[The puzzle] is 4 billion years old. A computer program from a highly advanced civilisation, and it's hidden in the very fabric of life itself.“ In DIS: “Red Directive” the phrase was used in conjunction with saying the Progenitor technology was “used to design life itself.”

Burnham activates her holographic tricorder function from her tricom badge, first introduced in DIS: “Scavengers” as the 32nd Century combination tricorder, communicator and personal transporter. She also materializes a 32nd Century phaser pistol, which can be summoned at will thanks to it being composed of programmable matter.

Window-like gateways allowing instantaneous travel to other worlds was a hallmark of another ancient civilization, the Iconians (TNG: “Contagion”), who used them to control a vast empire which was destroyed over 200,000 years prior, although there were still survivors existing into the 32nd Century (DIS: “The Examples”). Their gateways also survived, with one being the focus of conflict in DS9: “To the Death”.

Tahal’s fleet will arrive in 60 minutes. Primarch Tahal is one of the five remaining Primarchs of the Bree Imperium, and in the past conquered Kellerun, Rayner’s planet. Rayner was the only survivor of his family.

Burnham has indeed seen the future - in DIS: “Face the Strange” she and Rayner were jumped 30 years ahead to see a lifeless Discovery and a Federation HQ devastated by the Breen thanks to them using Progenitor tech.

Rayner refers to the avalanche caused by Moll and L’ak on Q’Mau in order to facilitate their escape (DIS: “Red Directive”).

Culber gives Book a shot to counter radiation sickness. In TOS: “The Deadly Years”, the drug of choice to do that was hyronalin, was which also used during the TNG era in several episodes. Culber has had an existential crisis ever since he became host to the memories and personality of Jinaal on Trill (DIS: “Jinaal”).

Moll put L’ak in her personal pattern buffer in DIS: “Lagrange Point” to keep him safe.

Using plasma to take out multiple hostiles was a tactic used by Worf’s brother Kurn, who went to warp near the surface of a star, setting off a flare which destroyed his pursuers (TNG: “Redemption II”). In TNG: “Descent, Part II”, the Enterprise-D under Beverly Crusher’s command fired a particle beam into a star to make it erupt and destroy a Borg ship.

Culber tells Book to adjust the tractor beam to subspace resonance frequency 5.1732, then uses the classic “I’m a doctor, not a…” trope associated most with McCoy from TOS (my personal favorite is from TOS: “The Devil in the Dark”, where he complains about treating the silicon-based Horta with, “I’m a doctor, not a bricklayer!”).

Ferengi rummy is presumably a card game. Rummy is the name given to a group of Earth card games, with the most common variant being Gin Rummy. It is claimed that the name comes from using rum as betting stakes.

The Progenitor that greets Burnham is in an updated version of the original Progenitor makeup from TNG: “The Chase” (played then by Salome Jens, who went on to play the female Founder in DS9).

The Galactic Barrier is an energy field that surrounds the Milky Way, penetrated by the USS Enterprise in TOS: “Where No Man Has Gone Before” and then again in TOS: “By Any Other Name”. The Barrier also featured in DIS Season 4, with Species 10-C living beyond it in extragalactic space. The origins of the Barrier have never been explained on screen, although beta canon has offered some possibilities, one of which was the Progenitors (William Shatner and Judith and Garfield Reeves-Stevens’ Captain’s Glory).

The Progenitors were not the creators of the technology but think that it was made by their creators. So, basically, it’s Progenitors all the way down. And while they effectively could recreate a live body from a dead one, it would basically be a clone without any of the previous body’s memories or personality.

The Betazoid scientist Dr Marina Derex was one of those that discovered the Progenitor tech 800 years prior. Her clue was in the manuscript of her book, Labyrinths of the Mind (DIS: “Labyrinths”).

This is the first time Discovery has shown the ability to separate its saucer from its secondary hull. Saucer separation was mentioned as being possible in TOS behind the scenes documents but it was not until TNG: “Encounter at Farpoint” that separation (and rejoining) became a fact on screen.

“Infinite Diversity in Infinite Combinations” is a tenet of Vulcan philosophy, first mentioned in TOS: “Is There in Truth No Beauty?”, also known as IDIC. In-universe, it dates back to at least Surak’s time, c.300 CE (ENT: “The Forge”).

When Kovich tells her that all information regarding the Progenitor tech will be classified, Burnham quips she knows how those things work. When Discovery jumped to the 32nd Century at the end of Season 2 to prevent misuse of the Sphere Data, all knowledge of the spore drive was classified and scrubbed from 23rd century records, and even as far as the 32nd century was concerned the original Discovery was destroyed back then.

The device Burnham holds gives her access to the Infinity Room, a highly secure conference space, first seen in DIS: “Red Directive”.

Kovich cryptically says he’s “lived many years and many lives”. Given the scope of the Star Trek universe, this could very well be more than metaphorical. On the shelf behind him we see a bottle of Château Picard, Geordi LaForge’s VISOR and Benjamin Sisko’s baseball.

Agent Daniels first appeared in ENT: “Cold Front” as Crewman Daniels of the NX-01 Enterprise (which technically didn’t have a USS prefix until its refit). He was revealed to be a Time Agent, a temporal operative from the 31st Century fighting in the Temporal Cold War. He last appeared in ENT: “Storm Front, Part II”, informing Archer that due to his actions, the Temporal War was coming to an end.

Talaxians, of course, are Neelix’s race (VOY), last referenced in a reading list that included A Comprehensive Guide to Talaxian Hair Styles. The Eternal Archive also gave Book a cutting from the World Root, a tree system that extended across his now-destroyed planet Kwejian (DIS: “Labyrinths”). He planted it on Sanctuary Four, a planet used as a wildlife sanctuary for trance worms, one of which, nicknamed Molly was delivered there by Book in DIS: “That Hope is You, Part 1”.

The box on the table across from Admiral Burnham’s bed is the one made of Tulí wood, that contained the World Root cuttings, given to Book by the Eternal Archive. The color of the vegetation outside the window identifies the planet as Sanctuary Four.

Crepuscula was the very first planet we saw in the series, back in the first scene of DIS: “The Vulcan Hello”. Burnham and Philippa Georgiou performed a covert mission to restore the Crepusulans’ water supply, as the species was subject to General Order 1.

The age of Burnham’s son (and his Captain’s rank) implies that at least thirty-odd years have passed since Saru’s wedding.

Technically speaking, one “aye” means “I understand,” in response to information while “aye aye” means “I understand and will comply,” in response to an order.

Burnham’s shuttle bears the designation “UFP 47”, with 47 being a number which appears frequently in Star Trek, an in-joke started by TNG writer Joe Menosky, who was part of the 47 Society at California’s Pomona College. In the lake we see trance worms swimming. The warp streaks as the shuttle travels are consistent with what we saw of the pathway drive.

Burnham and Book’s son is named Leto, after Book’s nephew who died when Kwejian was destroyed (DIS: “Kobayashi Maru”).

The ending finally brings continuity in line with ST: “Calypso”, where Craft came across a deserted Discovery, empty save for Zora, adrift for a thousand years in deep space. For the longest time we were wondering how it would work since the starship was shown without its “A” suffix, which she obtained when refitted in the 32nd Century to hide her origins in the 23rd Century. The removal of the “A” by DOTs as Burnham’s shuttle flies in, the reattchment of the ship's nacelles and Burnham's use of the term “Red Directive” implies that this is due to Kovich/Daniels’ instructions, and the restoration of the original ship is to bring it in line with history due to timey-wimey reasons.

The title was first used in the context of the Progenitors in TNG: “The Chase” when Picard remarked, “[The puzzle] is 4 billion years old. A computer program from a highly advanced civilisation, and it's hidden in the very fabric of life itself.“ In DIS: “Red Directive” the phrase was used in conjunction with saying the Progenitor technology was “used to design life itself.”

Burnham activates her holographic tricorder function from her tricom badge, first introduced in DIS: “Scavengers” as the 32nd Century combination tricorder, communicator and personal transporter. She also materializes a 32nd Century phaser pistol, which can be summoned at will thanks to it being composed of programmable matter.

Window-like gateways allowing instantaneous travel to other worlds was a hallmark of another ancient civilization, the Iconians (TNG: “Contagion”), who used them to control a vast empire which was destroyed over 200,000 years prior, although there were still survivors existing into the 32nd Century (DIS: “The Examples”). Their gateways also survived, with one being the focus of conflict in DS9: “To the Death”.

Tahal’s fleet will arrive in 60 minutes. Primarch Tahal is one of the five remaining Primarchs of the Bree Imperium, and in the past conquered Kellerun, Rayner’s planet. Rayner was the only survivor of his family.

Burnham has indeed seen the future - in DIS: “Face the Strange” she and Rayner were jumped 30 years ahead to see a lifeless Discovery and a Federation HQ devastated by the Breen thanks to them using Progenitor tech.

Rayner refers to the avalanche caused by Moll and L’ak on Q’Mau in order to facilitate their escape (DIS: “Red Directive”).

Culber gives Book a shot to counter radiation sickness. In TOS: “The Deadly Years”, the drug of choice to do that was hyronalin, was which also used during the TNG era in several episodes. Culber has had an existential crisis ever since he became host to the memories and personality of Jinaal on Trill (DIS: “Jinaal”).

Moll put L’ak in her personal pattern buffer in DIS: “Lagrange Point” to keep him safe.

Using plasma to take out multiple hostiles was a tactic used by Worf’s brother Kurn, who went to warp near the surface of a star, setting off a flare which destroyed his pursuers (TNG: “Redemption II”). In TNG: “Descent, Part II”, the Enterprise-D under Beverly Crusher’s command fired a particle beam into a star to make it erupt and destroy a Borg ship.

Culber tells Book to adjust the tractor beam to subspace resonance frequency 5.1732, then uses the classic “I’m a doctor, not a…” trope associated most with McCoy from TOS (my personal favorite is from TOS: “The Devil in the Dark”, where he complains about treating the silicon-based Horta with, “I’m a doctor, not a bricklayer!”).

Ferengi rummy is presumably a card game. Rummy is the name given to a group of Earth card games, with the most common variant being Gin Rummy. It is claimed that the name comes from using rum as betting stakes.

The Progenitor that greets Burnham is in an updated version of the original Progenitor makeup from TNG: “The Chase” (played then by Salome Jens, who went on to play the female Founder in DS9).

The Galactic Barrier is an energy field that surrounds the Milky Way, penetrated first by the USS Enterprise in TOS: “Where No Man Has Gone Before” and then again in TOS: “By Any Other Name”. The Barrier also featured in DIS Season 4, with Species 10-C living beyond it in extragalactic space. The origins of the Barrier have never been explained on screen, although beta canon has offered some possibilities, one of which was the Progenitors (William Shatner and Judith and Garfield Reeves-Stevens’ Captain’s Glory).

The Progenitors were not the creators of the technology but think that it was made by their creators. So, basically, it’s Progenitors all the way down. And while they effectively could recreate a live body from a dead one, it would basically be a clone without any of the previous body’s memories or personality.

The Betazoid scientist Dr Marina Derex was one of those that discovered the Progenitor tech 800 years prior. Her clue was in the manuscript of her book, Labyrinths of the Mind (DIS: “Labyrinths”).

“Infinite diversity in Infinite Combinations” is a tenet of Vulcan philosophy, first mentioned in TOS: “Is There in Truth No Beauty?”, also known as IDIC. In-universe, it dates back to at least Surak’s time, c.300 CE (ENT: “The Forge”).

When Kovich tells her that all information regarding the Progenitor tech will be classified, Burnham quips she knows how those things work. When Discovery jumped to the 32nd Century at the end of Season 2 to prevent misuse of the Sphere Data, all knowledge of the spore drive was classified and scrubbed from 23rd century records, and even as far as the 32nd century was concerned the original Discovery was destroyed back then.

The device Burnham holds gives her access to the Infinity Room, a highly secure conference space, first seen in DIS: “Red Directive”.

Kovich cryptically says he’s “lived many years and many lives”. Given the scope of the Star Trek universe, this could very well be more than metaphorical. On the shelf behind him we see a bottle of Château Picard, Geordi LaForge’s VISOR and Benjamin Sisko’s baseball.

Agent Daniels first appeared in ENT: “Cold Front” as Crewman Daniels of the NX-01 Enterprise (which technically didn’t have a USS prefix until its refit). He was revealed to be a Time Agent, a temporal operative from the 31st Century fighting in the Temporal Cold War. He last appeared in ENT: “Storm Front, Part II”, informing Archer that due to his actions, the Temporal War was coming to an end.

Talaxians, of course, are Neelix’s race (VOY), last referenced in a reading list that included A Comprehensive Guide to Talaxian Hair Styles. The Eternal Archive also gave Book a cutting from the World Root, a tree system that extended across his now-destroyed planet Kwejian (DIS: “Labyrinths”). He planted it on Sanctuary Four, a planet used as a wildlife sanctuary for trance worms, one of which, nicknamed Molly was delivered there by Book in DIS: “That Hope is You, Part 1”.

The box on the table across from Admiral Burnham’s bed is the one made of Tulí wood, that contained the World Root cuttings, given to Book by the Eternal Archive. The color of the vegetation outside the window identifies the planet as Sanctuary Four.

Crepuscula was the very first planet we saw in the series, back in the first scene of DIS: “The Vulcan Hello”. Burnham and Philippa Georgiou performed a covert mission to restore the Crepusulans’ water supply, as the species was subject to General Order 1.

The age of Burnham’s son (and his Captain’s rank) implies that at least thirty-odd years have passed since Saru’s wedding.

Technically speaking, one “aye” means “I understand,” in response to information while “aye aye” means “I understand and will comply,” in response to an order.

Burnham’s shuttle bears the designation “UFP 47”, with 47 being a number which appears frequently in Star Trek, an in-joke started by TNG writer Joe Menosky, who was part of the 47 Society at California’s Pomona College. In the lake we see trance worms swimming. The warp streaks as the shuttle travels are consistent with what we saw of the pathway drive.

Burnham and Book’s son is named Leto, after Book’s nephew who died when Kwejian was destroyed (DIS: “Kobayashi Maru”).

The ending finally brings continuity in line with ST: “Calypso”, where Craft came across a deserted Discovery, empty save for Zora, adrift for a thousand years in deep space. For the longest time we were wondering how it would work since the starship was shown without its “A” suffix, which she obtained when refitted in the 32nd Century to hide her origins in the 23rd Century. The removal of the “A” by DOTs as Burnham’s shuttle flies in, the reattchment of the ship's nacelles and Burnham's use of the term “Red Directive” implies that this is due to Kovich/Daniels’ instructions, and the restoration of the original ship is to bring it in line with history due to timey-wimey reasons.

The title refers to points of gravitational equilibrium in space between two gravitationally massive objects, named Lagrange points after Italian scientist Joseph-Louis Lagrange (1736-1813). Five Lagrange points can be defined for two bodies. Lagrange points are well known in science fiction as locations where orbital colonies like O’Neill cylinders can be anchored with minimal need for thrusters to keep them from drifting.

Tahal was the Breen Primarch that made Kellerun into a forward base in the past, as stated by Rayner in DIS: “Erigah”.

Rillak is informed that Moll’s dreadnought has exited a transwarp tunnel. Transwarp conduits were first seen being used by the Borg to achieve speeds at least twenty times more than a Galaxy-class ship’s maximum warp (TNG: “Descent”). After the Borg were decimated in VOY: “Endgame”, the conduits remained and were utilized by others (PIC: “Broken Pieces”). In the 32nd Century, Osyraa used a transwarp tunnel to chase down Discovery (DIS: “Su’Kal”.). The use of transwarp networks might explain how the Breen dealt with the deactivation of dilithium during the Burn.

Discovery has a cloaking device, fitted when it was installed with 32nd Century technology (DIS: “That Hope is You, Part 2”). As per last week’s annotations, the 24th Century prohibition against the Federation using cloaking technology due to the Treaty of Algeron no longer appears to apply.

Primordial black holes are black holes that are believed to have formed very soon after the Big Bang. In Season 4, it was hypothesized that the Dark Matter Anomaly might have been a primordial wormhole, but this turned out to be incorrect (DIS: “Anomaly”).

From the viewscreen, the Progenitor technology is anchored at Lagrange Point 1, or L1, between the two bodies where their gravitational forces and centrifugal force balance out. The problem, however, is that L1, L2 and L3 are not great positions because they are still dynamically unstable, meaning objects there will still fall out of orbit without regular course and attitude corrections (every three weeks or so). Also, L4 and L5 are stable but only if the mass ratio between the two masses exceeds 24.96, which means the second black hole has to be much smaller than the first one for that to work. Not that real-world physics ever got in the way of the Rule of Cool in Star Trek, but still, if you're going to call an episode "Lagrange Point"…

Duranium alloys are commonly used in starship and starbase hulls across the galaxy. According to the Deep Space Nine Technical Manual, duranium occurs naturally in planetary crusts.

The EDF refers to the Earth Defence Force, which was the primary military arm of Earth prior to them rejoining the Federation (DIS: “People of Earth”). Despite being host to a Trill symbiont, Adira is human and was a member of the EDF at the time they took on the symbiont.

An unshielded exhaust port is, of course, the critical vulnerability of the first Death Star from Star Wars. As stated in DIS: “Labyrinths”, Breen code is in base-20, or duodeca.

Kira and Dukat also took advantage of Breen full-body suits, using them as a disguise in DS9: “Indiscretion” when they infiltrated a Breen labor camp.

The use of a transporter pattern buffer to preserve bodies was first seen in TNG: “Relics”, and subsequently used in DS9: “Our Man Bashir” and VOY: “Counterpoint”. We’ve also seen it used for medical reasons in SNW Season 1 (M’Benga’s daughter and during the Klingon War in SNW: “Under the Cloak of War”) and in DIS: “Stormy Weather”. As a security precaution, enemies can also be held in mid-transport as seen in TOS: “Day of the Dove”.

Primarch Ruhn also called the Federation “spineless, insignificant achworms” in DIS: “Erigah”.

The Pathway drive is a prototype stardrive of which little has been revealed. The prototype was installed on the Voyager-J for testing (DIS: “Kobayashi Maru”) the previous year. This is the first time that it’s been stated that the Mitchell also has one, perhaps indicating that it is out of the testing phase.

We are reminded again that Burnham’s primary training is in xenoanthropology (DIS: “The Vulcan Hello”).

“A grum of osikod” is a quotation from the Kellerun Ballad of Krul (DIS: “Mirrors”). From context it seems to mean the equivalent of “a pinch of salt”. But referencing Kellerun gives Rayner the cue to pay attention when Burnham says “flying out there all alone, out in space… I always knew my crew would come for me.”

“Failure is not an option,” is a saying famously associated with NASA Flight Director Gene Kranz during the Apollo 13 rescue mission, although he never actually said it. It was coined for the 1995 movie and became the tagline for it.

The title refers to points of gravitational equilibrium in space between two gravitationally massive objects, named Lagrange points after Italian scientist Joseph-Louis Lagrange (1736-1813). Five Lagrange points can be defined for two bodies. Lagrange points are well known in science fiction as locations where orbital colonies like O’Neill cylinders can be anchored with minimal need for thrusters to keep them from drifting.

Tahal was the Breen Primarch that made Kellerun into a forward base in the past, as stated by Rayner in DIS: “Erigah”.

Rillak is informed that Moll’s dreadnought has exited a transwarp tunnel. Transwarp conduits were first seen being used by the Borg to achieve speeds at least twenty times more than a Galaxy-class ship’s maximum warp (TNG: “Descent”). After the Borg were decimated in VOY: “Endgame”, the conduits remained and were utilized by others (PIC: “Broken Pieces”). In the 32nd Century, Osyraa used a transwarp tunnel to chase down Discovery (DIS: “Su’Kal”). The use of transwarp networks might explain how the Breen dealt with the deactivation of dilithium during the Burn.

Discovery has a cloaking device, fitted when it was installed with 32nd Century technology (DIS: “That Hope is You, Part 2”). As per last week’s annotations, the 24th Century prohibition against the Federation using cloaking technology due to the Treaty of Algeron no longer appears to apply.

Primordial black holes are black holes that are believed to have formed very soon after the Big Bang. In Season 4, it was hypothesized that the Dark Matter Anomaly might have been a primordial wormhole, but this turned out to be incorrect (DIS: “Anomaly”).

From the viewscreen, the Progenitor technology is anchored at Lagrange Point 1, or L1, between the two bodies where their gravitational forces and centrifugal force balance out. The problem, however, is that L1, L2 and L3 are not great positions because they are still dynamically unstable, meaning objects there will still fall out of orbit without regular course and attitude corrections (every three weeks or so). Also, L4 and L5 are stable but only if the mass ratio between the two masses exceeds 24.96, which means the second black hole has to be much smaller than the first one for that to work. Not that real-world physics ever got in the way of the Rule of Cool in Star Trek, but still, if you're going to call an episode "Lagrange Point"…

Duranium alloys are commonly used in starship and starbase hulls across the galaxy. According to the Deep Space Nine Technical Manual, duranium occurs naturally in planetary crusts.

The EDF refers to the Earth Defence Force, which was the primary military arm of Earth prior to them rejoining the Federation (DIS: “People of Earth”). Despite being host to a Trill symbiont, Adira is human and was a member of the EDF at the time they took on the symbiont.

An unshielded exhaust port is, of course, the critical vulnerability of the first Death Star from Star Wars. As stated in DIS: “Labyrinths”, Breen code is in base-20, or duodeca.

Kira and Dukat also took advantage of Breen full-body suits, using them as a disguise in DS9: “Indiscretion” when they infiltrated a Breen labor camp.

The use of a transporter pattern buffer to preserve bodies was first seen in TNG: “Relics”, and subsequently used in DS9: “Our Man Bashir” and VOY: “Counterpoint”. We’ve also seen it used for medical reasons in SNW Season 1 (M’Benga’s daughter and during the Klingon War in SNW: “Under the Cloak of War”) and in DIS: “Stormy Weather”. As a security precaution, enemies can also be held in mid-transport as seen in TOS: “Day of the Dove”.

Primarch Ruhn also called the Federation “spineless, insignificant achworms” in DIS: “Erigah”.

The Pathway drive is a prototype stardrive of which little has been revealed. The prototype was installed on the Voyager-J for testing (DIS: “Kobayashi Maru”) the previous year. This is the first time that it’s been stated that the Mitchell also has one, perhaps indicating that it is out of the testing phase.

We are reminded again that Burnham’s primary training is in xenoanthropology (DIS: “The Vulcan Hello”).

“A grum of osikod” is a quotation from the Kellerun Ballad of Krul (DIS: “Mirrors”). From context it seems to mean the equivalent of “a pinch of salt”. But referencing Kellerun gives Rayner the cue to pay attention when Burnham says “flying out there all alone, out in space… I always knew my crew would come for me.”

“Failure is not an option,” is a saying famously associated with NASA Flight Director Gene Kranz during the Apollo 13 rescue mission, although he never actually said it. It was coined for the 1995 movie and became the tagline for it.

The title refers to Labyrinths of the Mind, a book written by Dr Marina Derex, a Betazoid and one of the group that hid the Progenitor technology 800 years prior. A labyrinth is also a term for a maze, the original designed by the inventor Daedelus of Greek myth to house the Minotaur.

As mentioned in DIS: “Erigah”, L’ak was the Scion, a direct descendant of the Breen emperor, and held the genetic code of the Yod-Thot, “they who rule”, without whom his uncle, Primarch Ruhn, could not claim the throne. In DIS: “Jinaal”, Stamets discovered the the Progenitor techonlogy could potentially bring someone back to life.

Discovery jumps to just outside the Badlands, first appearing in DS9: “The Maquis” as an area of violent plasma storms in proximity to Bajor and Cardassia.

The shape of Hy’Rell’s head bumps resemble those of Xindi-Primates, first appearing in ENT: “The Xindi”, one of six intelligent Xindi species that were native to Xindus. The other possibility, taking into account her long white hair and blue eyes, is that she’s an Efrosian (ST VI).

Cerenkov radiation is created when particles exceed the speed of light in a given medium, creating a shockwave with a characteristic blue glow. In real life, it is most often seen around nuclear reactors submerged in water (the speed of light in water is 75% of that in vacuum, allowing emissions from the reactor to exceed that).

Discovery was given the ability to cloak when it was refitted (DIS: “That Hope is You, Part 2”). During the 24th Century, the Treaty of Algeron forbade the Federation from using or developing cloaking devices (TNG: "The Pegasus"), with a notable exception being the Defiant during the Dominion War (DS9: “The Search”). Apparently that prohibition no longer applies in the 32nd Century. Cerenkovn, Book’s world, was destroyed in DIS: “Kobayashi Maru”, making him one of the last of his species.

The scenes in the Eternal Archive were filmed at the Thomas Fisher Rare Book Library in Toronto, Canada.

An oubliette is a specific type of dungeon, of which the only access is a trap door installed in the ceiling of the dungeon, and usually extremely narrow, such that the prisoner was unable to sit down.

The Tuli tree was native to Kwejian and had a distinctive smell to its sap. The decor of Book’s ship was made to simulate Tuli wood (DIS: “Stormy Weather”). Inside the box are cuttings from the World Root, a tree root system that reached all the way around the planet (DIS: “Kobayashi Maru”) and was sacred to the Kwejian.

Culber identifies the device affecting Burnham as a nucleonic emitter. Nucleonic particles appear in a number of places in Star Trek lore, but most appropriately in TNG: “The Inner Light”, where a nucleonic beam from a Kataan probe was responsible for sending Picard into a mindscape where he lived out a simulated lifetime in a similar manner to what Burnham is experiencing. In that episode, an attempt to disrupt the beam nearly killed Picard, which is the risk Culber is alluding to.

The old school card index drawers Burnham looks at makes me nostalgic for the days when I was a student librarian (yes, I’m old). The mindscape Archives’ category number for history is 002818/5 - in our Dewey Decimal System, history (and geography) is 900.

Book says “Those who learn history aren’t doomed to repeat it.” The usual phrasing of that adage is “Those who do not learn from history are doomed to repeat it.” The philosopher George Satayana is credited with the original “Those who cannot remember the past are condemned to repeat it.”

Burnham refers to the itronok, a predatory species they encounted on Trill while searching for the clue there (DIS: “Jinaal”).

Trémaux’s algorithm is a maze-solving method devised by Charles Pierre Trémaux, which involves drawing lines on the floor marking a path. A version of it - called a depth first search - is used to search tree or graph data structures.

Derex’s reading list references Talaxians, Neelix’s species from VOY and Hupyrians, the species of the Ferengi Grand Nagus’ servants (DS9: “The Nagus”, et al.). Euclid was a Greek mathematician who devised an axiomatic system for geometry.

Rhys intends to use the plasma storms for cover, which is exactly what made the Badlands effective as a hiding place for the Bajoran Resistance and the Maquis back in their day.

Matching weapons to shield frequencies to get past them is a tried and true method, demonstrated most dramatically when the Enterprise-D was destroyed in ST: Generations. Duodeca is a base-20 system.

Hysperia is a planet where the inhabitants have a culture based on a medieval fantasy motif (LD: “Where Pleasant Fountains Lie”). In the 24th Century, Chief Engineer Billups of the USS Cerritos was a native of Hysperia and the ostensible Crown Prince, although he abdicated that position.

Commander Jemison shares a last name with former astronaut Mae Jemison, the first African-American woman in space, who appeared in TNG: “Second Chances” as LT jg Palmer.

A tergun is a sacred Breen oath. Ruhn’s remark that the Federation to save the few would risk the many is reminiscent of Kirk’s inversion in ST III of Spock’s adage about the needs of the many and the few from ST II: “The needs of the one outweighed the needs of the many.”

“Never turn your back on a Breen” is a Romulan saying (DS9: “By Inferno’s Light”), cited by Rayner in DIS: “Erigah”.

The title refers to Labyrinths of the Mind, a book written by Dr Marina Derex, a Betazoid and one of the group that hid the Progenitor technology 800 years prior. A labyrinth is also a term for a maze, the original designed by the inventor Daedelus of Greek myth to house the Minotaur.

As mentioned in DIS: “Erigah”, L’ak was the Scion, a direct descendant of the Breen emperor, and held the genetic code of the Yod-Thot, “they who rule”, without whom his uncle, Primarch Ruhn, could not claim the throne. In DIS: “Jinaal”, Stamets discovered the the Progenitor techonlogy could potentially bring someone back to life.

Discovery jumps to just outside the Badlands, first appearing in DS9: “The Maquis” as an area of violent plasma storms in proximity to Bajor and Cardassia.

The shape of Hy’Rell’s head bumps resemble those of Xindi-Primates, first appearing in ENT: “The Xindi”, one of six intelligent Xindi species that were native toCerenkov The other possibility, taking into account her long white hair and blue eyes, is that she’s an Efrosian (ST VI).

Cerenkov radiation is created when particles exceed the speed of light in a given medium, creating a shockwave with a characteristic blue glow. In real life, it is most often seen around nuclear reactors submerged in water (the speed of light in water is 75% of that in vacuum, allowing emissions from the reactor to exceed that).

Discovery was given the ability to cloak when it was refitted (DIS: “That Hope is You, Part 2”). During the 24th Century, the Treaty of Algeron forbade the Federation from using or developing cloaking devices (TNG: "The Pegasus"), with a notable exception being the Defiant during the Dominion War (DS9: “The Search”). Apparently that prohibition no longer applies in the 32nd Century.

Kwejian, Book’s world, was destroyed in DIS: “Kobayashi Maru”, making him one of the last of his species.

The scenes in the Eternal Archive were filmed at the Thomas Fisher Rare Book Library in Toronto, Canada.

An oubliette is a specific type of dungeon, of which the only access is a trap door installed in the ceiling of the dungeon, and usually extremely narrow, such that the prisoner was unable to sit down.

The Tuli tree was native to Kwejian and had a distinctive smell to its sap. The decor of Book’s ship was made to simulate Tuli wood (DIS: “Stormy Weather”). Inside the box are cuttings from the World Root, a tree root system that reached all the way around the planet (DIS: “Kobayashi Maru”) and was sacred to the Kwejian.

Culber identifies the device affecting Burnham as a nucleonic emitter. Nucleonic particles appear in a number of places in Star Trek lore, but most appropriately in TNG: “The Inner Light”, where a nucleonic beam from a Kataan probe was responsible for sending Picard into a mindscape where he lived out a simulated lifetime in a similar manner to what Burnham is experiencing. In that episode, an attempt to disrupt the beam nearly killed Picard, which is the risk Culber is alluding to.

The old school card index drawers Burnham looks at makes me nostalgic for the days when I was a student librarian (yes, I’m old). The mindscape Archives’ category number for history is 002818/5 - in our Dewey Decimal System, history (and geography) is 900.

Book says “Those who learn history aren’t doomed to repeat it.” The usual phrasing of that adage is “Those who do not learn from history are doomed to repeat it.” The philosopher George Satayana is credited with the original “Those who cannot remember the past are condemned to repeat it.”

Burnham refers to the itronok, a predatory species they encounted on Trill while searching for the clue there (DIS: “Jinaal”).

Trémaux’s algorithm is a maze-solving method devised by Charles Pierre Trémaux, which involves drawing lines on the floor marking a path. A version of it - called a depth first search - is used to search tree or graph data structures.

Derex’s reading list references Talaxians, Neelix’s species from VOY and Hupyrians, the species of the Ferengi Grand Nagus’ servants (DS9: “The Nagus”, et al.). Euclid was a Greek mathematician who devised an axiomatic system for geometry.

Rhys intends to use the plasma storms for cover, which is exactly what made the Badlands effective as a hiding place for the Bajoran Resistance and the Maquis back in their day.

Matching weapons to shield frequencies to get past them is a tried and true method, demonstrated most dramatically when the Enterprise-D was destroyed in ST: Generations. Duodeca is a base-20 system.

Hysperia is a planet where the inhabitants have a culture based on a medieval fantasy motif (LD: “Where Pleasant Fountains Lie”). In the 24th Century, Chief Engineer Billups of the USS Cerritos was a native of Hysperia and the ostensible Crown Prince, although he abdicated that position.

Commander Jemison shares a last name with former astronaut Mae Jemison, the first African-American woman in space, who appeared in TNG: “Second Chances” as LT jg Palmer.

A tergun is a sacred Breen oath. Ruhn’s remark that the Federation to save the few would risk the many is reminiscent of Kirk’s inversion in ST III of Spock’s adage about the needs of the many and the few from ST II: “The needs of the one outweighed the needs of the many.”

“Never turn your back on a Breen” is a Romulan saying (DS9: “By Inferno’s Light”), cited by Rayner in DIS: “Erigah”.

As stated in DIS: “Mirrors”, an erigah is a Breen blood bounty.

The ship holding Moll and L’ak’s shuttle in a tractor beam is the USS Locherer (NCC-325062), a Merian-class starship first seen in DIS: “Jinaal” and named after the late J.P. Locherer, who was a cinematographer on the show.

Burnham identifies subspace frequency Epsilon 19 as a courier channel and that “special offer” is a courier distress code. With her is Commander Nhan, a Barzan who journeyed with Discovery from the 23rd Century but subsequently transferred to Federation Security in the 32nd. She was last seen in DIS: “Rubicon”.

Nhan refers to what happened between her and Book at their last encounter, when she argued for destroying his ship to prevent him using the isolytic weapon she mentioned. So there’s a bit of awkward history there.

A sa-te kru cat is a Vulcan species, a large predator similar to the le-matya. It was mentioned in the novel Vulcan’s Forge, but this is its first on-screen mention.

Given the Breen first appeared in DS9, there are plenty of back references to the series.

Culber says that there’s some evidence Breen are capable of “somatic cell” regeneration in extreme cold. This tracks with reports that the Breen homeworld had a freezing climate (DS9: “Til Death Do Us Part”) and that they wore refrigeration suits (DS9: “The Changing Face of Evil”). I’m not sure why Culber needs to distinguish “somatic cell”, since that is really any other cell in the body aside from sperm and egg cells, but I guess it sounds medically cool.

Breen Dreadnoughts (Rezeth Destroyers) are ships from Star Trek Online. As we see later, the 32nd Century version is much bigger.

The Breen used to be a Confederacy in the 24th Century (DS9: “Strange Bedfellows”) but somewhere along the way it’s become an Imperium. There are six primarchs vying for the throne in the wake of the emperor’s death.

Rayner talks about the last time the Breen entered Federation space. With Vance saying that Starfleet was caught flat-footed, this is probably referring to the Breen sneak attack on Earth during the Dominion War which heavily damaged Starfleet Headquarters and San Francisco (“The Changing Face of Evil”). Tilly’s later remark about the Breen “destroying an entire city” may also refer to this.

Using thoron emitters and duranium shadows to fool enemy sensors is a reference to DS9: “Emissary”, when the station used such a tactic to block sensors and make themselves appear better armed than they were. In DS9: “The Way of the Warrior”, the Changeling Martok believed the station was pulling the same trick, but that time he proved to be wrong. The Romulan saying “Never turn your back on a Breen” is from DS9: “By Inferno’s Light”.

The yellow alert symbols are the same design as the “Alert: Condition Red” indicators dating back to ST II, albeit in yellow. The USS Mitchell (NCC-325027), another Merian-class starship, is named after the late Kenneth Mitchell, who played Kol, Kol-sha and Aurellio in DIS. She was last mentioned in DIS: “Coming Home”.

L’ak is Primarch Ruhn’s nephew and carries within him the genetic code of the Yod-Thot, “they who rule”. He is also a direct descendant of the emperor and Ruhn cannot claim the throne without him.

One of Reno’s former jobs was as a bartender - the closed captioning says “Ashalon IV”, but it might be a misspelling of “ Aschelan IV”. Aschelan V was a planet which housed a Cardassian fuel depot (DS9: “Dreadnought”). She refers to a cocktail named “Seven of Limes”, which is an obvious pun on Seven of Nine, although Reno may not know the name’s provenance given that she left for the future about a century before Annika Hansen was assimilated.

A “Code One Alpha” is probably related to or the same as the 23rd-24th Century “Code One Alpha Zero” which is an emergency condition ordered when there is an attack (ST 2009) or a distress call (TNG: “Relics”).

Kellerun was, for a time, used as a Breen forward base by Primarch Tahal. Since Rayner was there, it must have been relatively recent, although to be fair we don’t know how long Kellerun live.

Reno remarks that the hunt “sounds like something out of a holodeck adventure for the littles.” She may be referring to The Littles, a series of children’s adventure novels featuring a family of tiny humanoids with mice-like faces and tails that were written between 1967 and 2003 by John Peterson. There was also an animated series that ran for 3 seasons between 1983 and 1985. Or I’m overthinking and she’s just talking about kids in general.

Rayner says Tahal named her ship the Tau Ceti after a lethal viper with a slow acting venom. Tau Ceti, is of course, the name of a star 12 light years away from Earth and has been mentioned many times in Star Trek.

Bopak III was an uninhabited planet (at least in 2372) in the Gamma Quadrant and the location for the events of DS9: “Hippocratic Oath”.

Tricordrazine is a stimulant apparently derived from cordrazine (TOS: “The City on the Edge of Forever”) and appeared in several TNG episodes, including TNG: “Ethics” and “Shades of Grey”.

The Badlands is an area of space in proximity to Cardassia and Bajor (and DS9), known for its violent plasma storms (DS9: “The Maquis”). Both the Bajoran Resistance and the Maquis used it as a staging area to hide from enemy patrols during their respective conflicts. In 2371, while pursuing a Maquis ship there, the USS Voyager was hurled across the galaxy to the Delta Quadrant by an alien force (VOY: “Caretaker”).

As stated in DIS: “Mirrors”, an erigah is a Breen blood bounty.

The ship holding Moll and L’ak’s shuttle in a tractor beam is the USS Locherer (NCC-325062), a Merian-class starship first seen in DIS: “Jinaal” and named after the late J.P. Locherer, who was a cinematographer on the show.

Burnham identifies subspace frequency Epsilon 19 as a courier channel and that “special offer” is a courier distress code. With her is Commander Nhan, a Barzan who journeyed with Discovery from the 23rd Century but subsequently transferred to Federation Security in the 32nd. She was last seen in DIS: “Rubicon”.

Nhan refers to what happened between her and Book at their last encounter, when she argued for destroying his ship to prevent him using the isolytic weapon she mentioned. So there’s a bit of awkward history there.

A sa-te kru cat is a Vulcan species, a large predator similar to the le-matya. It was mentioned in the novel Vulcan’s Forge, but this is its first on-screen mention.

Given the Breen first appeared in DS9, there are plenty of back references to the series.

Culber says that there’s some evidence Breen are capable of “somatic cell” regeneration in extreme cold. This tracks with reports that the Breen homeworld had a freezing climate (DS9: “Til Death Do Us Part”) and that they wore refrigeration suits (DS9: “The Changing Face of Evil”). I’m not sure why Culber needs to distinguish “somatic cell”, since that is really any other cell in the body aside from sperm and egg cells, but I guess it sounds medically cool.

Breen Dreadnoughts (Rezeth Destroyers) are ships from Star Trek Online. As we see later, the 32nd Century version is much bigger.

The Breen used to be a Confederacy in the 24th Century (DS9: “Strange Bedfellows”) but somewhere along the way it’s become an Imperium. There are six primarchs vying for the throne in the wake of the emperor’s death.

Rayner talks about the last time the Breen entered Federation space. With Vance saying that Starfleet was caught flat-footed, this is probably referring to the Breen sneak attack on Earth during the Dominion War which heavily damaged Starfleet Headquarters and San Francisco (“The Changing Face of Evil”). Tilly’s later remark about the Breen “destroying an entire city” may also refer to this.

Using thoron emitters and duranium shadows to fool enemy sensors is a reference to DS9: “Emissary”, when the station used such a tactic to block sensors and make themselves appear better armed than they were. In DS9: “The Way of the Warrior”, the Changeling Martok believed the station was pulling the same trick, but that time he proved to be wrong. The Romulan saying “Never turn your back on a Breen” is from DS9: “By Inferno’s Light”.

The yellow alert symbols are the same design as the “Alert: Condition Red” indicators dating back to ST II, albeit in yellow. The USS Mitchell (NCC-325027), another Merian-class starship, is named after the late Kenneth Mitchell, who played Kol, Kol-sha and Aurellio in DIS. She was last mentioned in DIS: “Coming Home”.

L’ak is Primarch Ruhn’s nephew and carries within him the genetic code of the Yod-Thot, “they who rule”. He is also a direct descendant of the emperor and Ruhn cannot claim the throne without him.

One of Reno’s former jobs was as a bartender - the closed captioning says “Ashalon IV”, but it might be a misspelling of “ Aschelan IV”. Aschelan V was a planet which housed a Cardassian fuel depot (DS9: “Dreadnought”). She refers to a cocktail named “Seven of Limes”, which is an obvious pun on Seven of Nine, although Reno may not know the name’s provenance given that she left for the future about a century before Annika Hansen was assimilated.

A “Code One Alpha” is probably related to or the same as the 23rd-24th Century “Code One Alpha Zero” which is an emergency condition ordered when there is an attack (ST 2009) or a distress call (TNG: “Relics”).

Kellerun was, for a time, used as a Breen forward base by Primarch Tahal. Since Rayner was there, it must have been relatively recent, although to be fair we don’t know how long Kellerun live.

Reno remarks that the hunt “sounds like something out of a holodeck adventure for the littles.” She may be referring to The Littles, a series of children’s adventure novels featuring a family of tiny humanoids with mice-like faces and tails that were written between 1967 and 2003 by John Peterson. There was also an animated series that ran for 3 seasons between 1983 and 1985. Or I’m overthinking and she’s just talking about kids in general.

Rayner says Tahal named her ship the Tau Ceti after a lethal viper with a slow acting venom. Tau Ceti, is of course, the name of a star 12 light years away from Earth and has been mentioned many times in Star Trek.

Bopak III was an uninhabited planet (at least in 2372) in the Gamma Quadrant and the location for the events of DS9: “Hippocratic Oath”.

Tricordrazine is a stimulant apparently derived from cordrazine (TOS: “The City on the Edge of Forever”) and appeared in several TNG episodes, including TNG: “Ethics” and “Shades of Grey”.

The Badlands is an area of space in proximity to Cardassia and Bajor (and DS9), known for its violent plasma storms (DS9: “The Maquis”). Both the Bajoran Resistance and the Maquis used it as a staging area to hide from enemy patrols during their respective conflicts. In 2371, while pursuing a Maquis ship there, the USS Voyager was hurled across the galaxy to the Delta Quadrant by an alien force (VOY: “Caretaker”).

The USS Locherer, a Merian-class starship, was first seen in DIS: “Jinaal”. It is named after the late JP Locherer, who was a cinematographer on DIS before he passed in 2022.

Kovich says he likes the feel of paper. A similar preference for “old-fashioned” books over electronic versions was exhibited by attorney Samuel T. Cogley in TOS: “Court Martial”. Fanon has often held that it was Cogley who passed on his love of physical books to Kirk, who from then on, as Spock noted in ST II, had a fondness for antiques.

Culber’s abuela is of course a simulation, since the real one would have died nearly a millennium before. The use of holograms as grief alleviation therapy was also in the Marvel Cinematic Universe, invented by Tony Stark as seen in Captain America: Civil War. Reflecting current events, people have been trying to AI to recreate the personalities of deceased loved ones.

The list of names are: Jinaal Bix (Trill, “Jinaal”), Carmen Cho (Terran, “Mirrors”), Vellek (Romulan, “Red Directive”), and the two not yet encountered Marina Derex (Betazoid) and Hitoroshi Kreel (Denobulan).

Silver iodide is indeed used in cloud seeding in order to encourage precipitation. Atmospheric extraction is also a very old method of getting water dating back as far back as the Incas. In science fiction, it’s probably best represented by the moisture farms on Tattooine in the Star Wars movies.

Halem’no has a pre-warp and pre-industrial civilization, so the Prime Directive applies. A discussion about whether or not Kreel already violated the PD by putting up the towers in the first place is beyond the scope of these annotations, but I’m looking forward to reading the discussions.

Whistled languages are rare, but exist on Earth, in various cultures. Michael’s enthusiasm for it speaks of her primary training as a xenoanthropologist (DIS: “The Vulcan Hello”).

Subcutaneous transponders date all the way back to the 22nd Century, first appearing in TOS: “Patterns of Force”. Subdermal communicators/transponders also appeared in ENT: “Stratagem”, TNG: “Who Watches the Watchers” and VOY: “Workforce”. This the first appearance of retinal tricorders.

The Halem’nite “sound cure” may look mystical and exotic, but they’re actually just using Tibetan singing bowls, albeit with a more intense effect.

Tilly is using a simplified Newton’s First Law (or the principle of inertia) as a mantra: a body in motion remains in motion in straight line, a body at rest remains at rest - unless acted on by an external force.

Tritanium is a super-hard metal first mentioned in TOS: “Obsession”, being 21.4 times as hard as diamond. In TNG: “The Arsenal of Freedom” Riker claimed that melting tritanium was beyond 24th Century technology. The metal routinely shows up in hulls, walls, tools, ammunition, etc. so while it may not be able to melt, it can certainly be fabricated with.

Culber uses the “they” pronoun to refer to Ravah.

Culber introduces Book to his abuela’s mofongo con pollo al ajillo. Mofongo is a Puerto Rican dish made from plantains mashed with fat. This variation is served with chicken (pollo) with an oil infused with garlic and guajillo chile (al ajillo).