Diary of a Mad Hatter/Keep It Under Your Hat

"Diary of a Mad Hatter/Keep It Under Your Hat" is the thirteenth episode of Adventures in Wonderland.

Synopsis
The Mad Hatter finds his great-grandhatter’s diary, which contains clues to a hidden treasure. The ensuing treasure hunt leads Wonderland’s residents on a merry chase, but eventually the treasure is found. To everyone’s surprise, the treasure is a collection of -what else?-hats!