Bart People

Bart People is a Bart Simpson's Treehouse of Horror story featured in.

Synopsis
Bart and Lisa find themselves cursed to transform into monstrous panther-people.

Plot
Lisa returns home after spending a week at saxophone camp and begins feeling strange. At Springfield Elementary the second, third and fourth grades have all been merged into one, putting Bart and Lisa in the same class. Bart requests to work with Lisa for a history project, but instead he is paired up with Janey. At Janey's house, Bart turns into a panther and is caught by the cops, but he is accidentally sent to Groundskeeper Willie the next day. After a fight with Willie, Bart transforms back into a human, only to find himself naked. He returns home and explains to Lisa that the pair of them are both cat people and will transform into panthers if they study with anyone other than each other. Lisa is studying with Milhouse and resists her transformation by thinking of saxophone music, while Bart, who is now studying with Üter, transforms again and rampages down the streets. Lisa calms Bart with her saxophone; he is caught again and sent to live at the zoo.