- Paris, Tuvok and B'Elanna were all demoted as a result of their actions in "Prime Factors". Helps explain the early inconsistencies in their rank pips.
- The "warship
Voyager" from "Living Witness" was real, and the episode took place in a variant of the Mirror Universe where the Terran Empire never fell. (The Doctor's backup module was an aberration, of course.)
- Chakotay and Eddington (from DS9) led completely separate Maquis cells and never actually met. In fact Chak would have killed Eddington personally if they HAD met, because he would have been horrified by Eddington's ego and over-the-top bloodlust.
- Characters played by Kurtwood Smith have REALLY shitty luck when it comes to time travel. This isn't head canon, really, just observation.