S17E04 Treehouse of Horror XVI
In Bartificial Intelligence, Bart falls into a coma after trying to jump into a swimming pool off a window ledge. Dr. Hibbert says that this coma is permanent, so the Simpsons get a robot for a son. Bart wakes up, only to be abandoned by Homer. He stays with some robots and becomes a robot himself, able to destroy the robot that replaced him. In Survival of the Fattest, Mr. Burns invites a bunch of people, including Homer, to a hunting party. But it turns into World's Most Dangerous Game when Burns starts killing everyone he can with his gun. Homer stays alive and Marge defeats Burns and Smithers with a frying pan. In I've Grown a Costume on Your Face, a witch turns Springfield residents into the costumes they were wearing at a party. Lisa, who is Albert Einstien, tries to solve everything. She finds that Maggie can turn them back to normal, being a witch. No one wants to be normal again, but Maggie turns everyone into pacifiers.