This year's Halloween episodes include: Bart teaming up with a band of rejected robots after being replaced while in a coma in "B.I.: Bartifical Intelligence," Homer and several male ancillary characters being hunted down by Mr. Burns as part of a reality show in "Survival of the Fattest," and a witch curses costumed townspeople after losing a Halloween contest in "(I've Grown) A-Costume To Your Face."
* AllJustADream: The events from "B.I.: Bartificial Intelligence" are Homer's dream.
* AndKnowingIsHalfTheBattle: Spoofed by Dennis Rodman.
* BecomingTheCostume: in "I've Grown a Costume on Your Face".
* BigDamnHeroes: Marge whacks Mr. Burns and Smithers with frying pans from behind and saves Homer in ''Survival of the Fattest''
* BurnTheWitch: After a witch is disqualified from a costume contest for being a real witch instead of someone wearing a witch costume, someone says "Burn her..." but it turns out he means the witch's prize instead of [[SubvertedTrope the witch herself]].
* CallBack: Yeardley Smith is credited as "[[Recap/TheSimpsonsS4E13SelmasChoice The Lizard Queen]]".
* DisproportionateRetribution: After being disqualified from a costume contest, a witch retaliates by cursing the townspeople into BecomingTheCostume.
* DisqualificationInducedVictory: The costume contest's runner-up becomes the new winner once the witch is disqualified for not wearing an actual costume.
* ForHalloweenImGoingAsMyself: The witch in "(I've Grown) A-Costume To Your Face"
* HumanShield: The robot that replaces Bart uses Homer as one to protect itself from Bart.
* HuntingTheMostDangerousGame: in "Survival of the Fattest".
* ShoutOut: One to Music/HerbieHancock's Rockit and Series/{{Bewitched}}.
* TakeThat: Kang and Kodos deliver one to the Cubs.
-->'''Kang:''' (using the Accele-Ray to speed up the World Series) Faster! Faster! Until the fabric of the universe itself may shatter!
-->'''Kodos:''' Good. Only then could the Cubs win!
* VisualPun: The robot that replaces Bart is "boot" started by being kicked by the technician who delivers him to the Simpsons.
* YouHaveOutlivedYourUsefulness: Burns' Blue-Haired Lawyer, who is arguably the most loyal employee of his (even over ''Smithers''), creates a binding contract for the game and once he signs it, is prompted executed by Burns.