The model assumes a linear relationship between dose and health effects, even for very low doses where biological effects are more difficult to observe. The LNT model implies that all exposure to ionizing radiation is harmful, regardless of how low the dose is, and that the effect is cumulative over lifetime.
Emphasis mine. Sure that's a valid model, but not backed up by concrete empirical evidence.
I've had the same issue with episodes generally. I have a python script that runs on a regular basis that just updates the episode number based on the premier date.