A Traveler's Guide to the Planets (2010)

S1E13 Diary of a Mad Hatter/Keep It Under Your Hat

The Mad Hatter discovers the diary of his great-grandhatter, filled with hints about a concealed treasure. This sparks an adventurous hunt through Wonderland as its inhabitants embark on a whimsical quest. Their excitement builds as they search high and low, ultimately leading to the treasure’s discovery. To their astonishment, the prized loot turns out to be an assortment of—what else?—hats!