Continuity mistake: In Season 2 Episode 22, Model Behavior, Woody has gotten his braces off. However, in this episode, he has braces back on again.
Continuity mistake: All the castle windows on the outside of the castle are small squares yet from inside the rooms they're arched.
Triumvirate of Terror! - S3-E8
Continuity mistake: After Joker subdues the other Amazonians, he is disguised as a female warrior and talks to Wonder Woman and her mother. There are no Amazonians knocked out in front of Joker and one is beside him with her head behind him. But in the reverse angle, that one has vanished and there is suddenly another Amazonian adjacent in front of Joker with her body in a different position. (00:11:10)
Six-Can Solution/Silence of the Sheep - S4-E21
Continuity mistake: In "The Six Can Solution" Odie steals 6 cans, then when he gets to the girl's house there are 12 cans in his red wagon when the camera zeros in on Squeak. (00:10:10 - 00:11:30)