I’m talking about a fan theory, that if true doesn’t drastically upend the fundamentals of the fiction it is set in.
Mine is that in the American Dad episode ‘Can I Be Frank With You’, that Snot’s uncle is actually just another Roger persona. He appears suddenly and conveniently to pitch a bizarre scheme, he loves hanging around with teen boys and doing drugs, and the very instant that the plan has a setback he kills himself out of sight of everyone else. That’s just Roger in a suit and glasses.
Edit: Ok, so, people are having trouble with the word “inconsequential”.
In Stargate SG-1 — spoilers — the last season they’re stuck on the ship stuck in time for a long time. I listened to the director’s commentary on it, and the actors themselves talked about how there was supposed to be a Carter and Teal’c romance. You can still see it in some of the looks they give each other and whatnot, but it was cut.
So not “fan theory” as such, but something not usually considered part of the canon but which definitely has credible support for it. (Amanda Tapping, the actor for Samantha Carter was talking about it on the commentary track.)
Doesn’t really change much, as all of them but Teal’c forget what happened after the conclusion.