MR. AND MRS. SIMPSON - Homer and Marge are contract killers that work for opposing people. They discover each other's identities when a job goes poorly. During their stand off, the parents are confronted by Chief Wiggum who comes to investigate on a noise complaint from a nosy neighbor.
E.T. GO HOME - Bart finds Kodo in the Simpson shed who convinces Bart that his mission is to go home and spread love and understanding to the world. Bart and Lisa try to hide Kodo from the authorities. Kodo is eventually defeated when he tries to unleash alien soldiers from the space portal he built.
HECK HOUSE - Bart and his friends start terrorizing the neighborhood when they decide to "trick" every house on Halloween instead of asking for treats. Ned's idea to scare them straight by using a converted church as a haunted house works until Flanders realizes that his scary presentation actually came from the Devil.