I've Got You Under My Skin/In a Jam/Junk in the Trunk - S1-E12
Continuity mistake: In a Jam: After Cuddles realises that The Mole gave him a button instead of a coin, he returns to the bloodmobile, and The Mole is sewing the coin onto his lab coat. The sewing thread is hanging from his lab coat in one place, but in the next shot, it is hanging from a different place on the lab coat. (00:10:14)