In "The Island of Dr. Hibbert" (Treehouse of Horror XIII), the Simpsons visit Dr. Hibbert's vacation island resort. Homer discovers that something creepy is going on -- Dr. Hibbert has transformed his guests into slovenly, marauding manimals and prowly, voracious invertibroads. Homer vows to fight back with all of his might. However, when he learns that all Dr. Hibbert's victims do is "eat, sleep, mate, roll around in their own filth, mate and eat," he reconsiders and happily joins them.
"The Island of Dr. Hibbert," set for release to stores in November. This set features all the Simpsons in their transformed state, and is a must-have for Simpsons fans.