Plot hole: In this episode, the Duboises make such a big deal about Ariel being old enough to finally learn to drive. However, two episodes previously ("Things to Do in Phoenix When You're Dead") Ariel drove to school with Joe, and Joe complimented her on her prowess.
Continuity mistake: Allison wakes up with an address in her hand, but when she later shows it to Scanlon, the writing is in a different position on the paper, and the paper does not show the folds it had earlier.