It's a Mad, Mad, Mad, Mad Marge

Otto dumps his fiancee, Becky, at the altar, leaving her to become the Simpsons' latest houseguest, prompting Marge to go insane when Patty and Selma scare Marge with thoughts of Becky replacing Marge as a wife and mother. Meanwhile, Springfield Elementary gives Bart's fourth grade class videocameras (after slashing geography out of the budget) and Bart sets out to create a movie.