Simpsons Season 17, Episode 4: Treehouse of Horror XVI

B.I.: Bartificial Intelligence – Bart falls into a coma after trying to jump into the swimming pool at Patty and Selma's apartment complex. With Bart incapacitated, the Simpsons buy a robot son, who proves to be a better son than Bart ever was. Survival of the Fattest – Homer and others are unwilling contestants on "The World Series of Manslaughter", a survival reality show in which Mr Burns tries to kill them all. I've Grown a Costume on Your Face – After she loses a Halloween costume contest, a witch turns the townspeople into their Halloween costumes, and Lisa (who is now Albert Einstein) finds out that Maggie (who is dressed as a witch) is the key to revert the spell