Big Gay Al's Big Gay Boat Ride - S1-E5
Continuity mistake: When the boys are playing football, as the shots change, if you look behind the bleachers, sometimes there are mountains and other times there is nothing but sky.
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: When the boys are standing in a group, Kenny disappears after a while, then Stan disappears, but then a second later, they are all back together.
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: In the end classroom scene, whenever they show Kyle, he is in front of the class, but in the wide shots, he is behind other kids.
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: Kyle has a black eye, but it has magically disappeared by the time he gets home.
An Elephant Makes Love to a Pig - S1-E6
Continuity mistake: Shelly throws Stan on the carpet, but then in the closeup, something blue appears under him. (Despite a deleted scene, this is still a mistake within the show.)
Continuity mistake: After Warsog gives his "statement" to the townspeople, he removes his glasses when telling them to direct their complaints to a nearby wall. Then, as he walks back inside, his glasses are back on his head. (00:15:05)
Continuity mistake: Just before Warsog emerges from the network building for the first time, Mrs. Marsh is shown to be stood next to a couple of random townspeople. In the very next shot Mrs. Cartman, Mrs. Broflovski and a third nondescript have appeared.
Continuity mistake: The birthday cake disappears in some shots after they give it to Stan's grandfather.
Other mistake: Both Kyle's and Stan's mothers are identified in this episode as Carol. They later become Sheila and Sharon.
Continuity mistake: When we see Kenny from the front, the hole in his head exposing his brain appears on his left side, but when we see the top of his head when he is biting people, the hole is in the back of his head.
Continuity mistake: In the opening scene, the trees in the background keep moving between shots.
Continuity mistake: Tom's Rhynoplasty appears between two different sets of buildings in the street shots.
Continuity mistake: In the cemetery scene where Kyle calls the emergency hotline and Stan and Cartman hold off the zombies, in the shot where Kyle's hand holding the Worcestershire Sauce is shown in close-up, his gloves are shown as green instead of white, which they are while Kyle is in his vampire costume.
Continuity mistake: During the scene where Chef goes to see the Mayor and Officer Barbrady, there is a shot from outside, where a pumpkin is visible in the window. But when Chef goes inside, there is no pumpkin.
Continuity mistake: When Kyle cuts Kenny in half, we see a skull behind him, but in the other scenes, the skull is to his right.
Continuity mistake: At the end when the airplane hits Kenny, there is a gravestone with a cross on it behind him, but all the time when the other three boys were talking, none of the gravestones behind them had crosses.
Revealing mistake: When Cartman walks in on Sally Struthers eating the cake, the cake has holes in it, and part of her hair goes in front, and part of it is visible through the cake. All of the other slices have holes in the same place as well.
Mr. Hankey, the Christmas Poo - S1-E10
Continuity mistake: When Mr. Hankey is dancing around Kyle's bathroom there are some poo marks where Mr. Hankey never even touched.
Mr. Hankey, the Christmas Poo - S1-E10
Character mistake: When the class are practising the nativity, Mrs Broflovski comes in and berates Mr Garrison for casting Kyle in the part of Joseph of Arimathea, but Joseph of Arimathea wasn't the husband of Mary, Jesus' mother, but a disciple of Jesus who helped in the burial of Jesus after his crucifixion.
Mr. Hankey, the Christmas Poo - S1-E10
Continuity mistake: In the scene where Mr. Garrison is telling the students to to get in place for the play, Kenny is seen in the group. Despite the fact that he is supposed to be taking the star or the ceiling at that point. He is then seen seconds later climbing down the ladder with the star.
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