Continuity mistake: When Linda closes Louise's bedroom door after giving her the melted toy, the doorknob is on the right hand side. In the next shot, it's on the left hand side.
Like Gene for Chocolate - S7-E12
Continuity mistake: When we first see the restaurant, the burger of the day board is partially seen and we see "bites." When we next see the burger of the day it's "citizen kale burger" and "bites" isn't seen anywhere.
Aquaticism - S7-E14
Continuity mistake: Near the end, when Roger is talking to Judy, he has a tie on. But in side shots of him, he has no tie on.
Answer: S04e15, "The Kids Rob a Train."
Bishop73