Continuity mistake: When Linda and the kids are walking back home, Linda doesn't have a fire hat on. But in the shot of just her, she's wearing one.
Prank You for Being a Friend - S10-E22
Continuity mistake: When Louise is in Mr. Frond's office taking about Kaylee, in shots of both of them, there's no file on the table. But in shots of Mr. Frond, there's a folder next to him.
Answer: S04e15, "The Kids Rob a Train."
Bishop73