Big Gay Al's Big Gay Boat Ride - S1-E5
Other mistake: You can see Token in the episode as white, not black.
Other mistake: Both Kyle's and Stan's mothers are identified in this episode as Carol. They later become Sheila and Sharon.
South Park (1997)
3 other mistakes in season 1 - chronological order
Starring: Trey Parker, Isaac Hayes, Matt Stone, Mona Marshall
Woodland Critter Christmas - S8-E14
Continuity mistake: The narrator says that it's "Christmas Eve day," but then the abortion doctor says that it's "three days until Christmas."
Scott: All of these things link Terrance to the murder: hair fibers, blood samples, nail clippings, a piece of his shirt, a watch with his initials on it, a day planner with the murder scheduled, a haiku called "Time to Kill Dr. Jeffrey O'Dwyer": Dr. O'Dwyer, time to have your head smashed in with my new hammer. Terrance, you may be a famous surgeon, but you're not God. J'accuse Terrance.
Question: Forgot the episode and the season, but does Mark, the kid that gets home schooled and ends up beating Kyle, ever show up in later episodes?
Answer: He appears in at least 5 other episodes, but usually just as a background character. He can be seen at Cartman's party in "Immaginationland". He was also one of the kids trying out to replace Butters in the "Professor Chaos" episode.
Bishop73