Mutiny on the Windbreaker - S3-E4
Other mistake: When Gene slaps the pennies out of the woman's hand with the glasses her eyes turn white with an animation error where her coat and mouth intersect. (00:16:45)
An Indecent Thanksgiving Proposal - S3-E5
Continuity mistake: When Mr. Fishoedor enters the restaurant, Bob is cleaning a coffee pot with a rag. In the next frame, the coffee pot vanishes from Bob's hand. Later, when the perspective is changed again, the coffee pot appears on top of a blue platform. (00:01:35)
Answer: S04e15, "The Kids Rob a Train."
Bishop73