Treehouse of Horror X/Gags

Couch gag

 * The family members appear as they have in previous Halloween episodes: Homer is a jack-in-the-box (from 8F02), Bart is a mutantfly (from 5F02), Marge is a witch (also from 5F02), and Maggie is an alien (from AABF01); Lisa, an ax victim (the only one not based on a previous episode), asks what aliens have to do with Halloween, and Maggie demands "Silence!" in a deep voice before disintegrating Lisa with a ray gun.