Kodos is a murderous ''E.T.'', Homer and Marge are dueling husband and wife assassins, and Flanders uses the seven deadly sins to scare some Halloween hoodlums straight.

!! Tropes:
* BondOneLiner: Parodied in "Mr. And Mrs. Simpson" as Homer plans to kill Kent Brockman:
-->'''Homer''' ''(thinking)'': Now to think of a cool thing to say before I kill him.
-->'''Homer''' ''(thinking)'': ''Ooh!'' That's a ''good'' one! But I don't have to say it aloud because no one's with me!
* DownerEnding: One of the few Halloween episodes to avert this. (Although it's ambiguous as to if the deaths in Heck House really happened)
* NoFourthWall/ BitingTheHandHumor: The introductory/ credit segments basically involves Marge murdering every Fox advertisement involving the NFL, ''American Idol'', and FOX's popular dramas and feeding them to the family.
** At the end, Ned tells us that we're going to Hell for watching FOX. "And that includes, FX, FOX Sports, and our newest Devil's portal ''The Wall Street Journal''."
* InsistentTerminology: Since Kodos was alive at the end, it was a vivisection and not a dissection.
* RiddleForTheAges: Whatever Homer thought about saying when he was about to kill Kent Brockman, he never said.
* SevenDeadlySins: "Heck House"
* ShoutOut: To ''ET'' and ''MrAndMrsSmith''.
** And to a lesser extent, ''Disney/{{Fantasia}}'', in "E.T. Go Home'' as the hordes of Kang's troops emerge from the space portal via resurrecting broomsticks of "The Sorcerer's Apprentice."