File:Chuck on the dance floor; Mysteries-Meddling Kids.jpg

After Ally's songbook is stolen at the 70's disco party at Marino High, a librarian describes the possible thief as somebody in a blonde afro wig with a white disco suit. The trouble is, that description fits three people, and one of them is Chuck, in the episode "Mysteries & Meddling Kids." Swiped from my iTunes copy.