The Simpsons

The Simpsons is an animated television series produced on Earth. Jonathan J. O'Neill is a fan of it.

Behind the scenes
In the universe of the real-life The Simpsons, the actor Richard Dean Anderson, who portrayed O'Neill in real life, and the Stargate franchise itself both exist. In the episode "Kiss Kiss, Bang Bangalore", Patty and Selma kidnap Anderson from a Stargate SG-1 convention. This leads to a strange "mutually fictional" situation. Presumably, in the Stargate universe, this episode either does not exist or its plot is different.