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:
* DownerEnding: One of the few halloween episodes to avert this. (Although it's ambiguous as to if the deaths in Heck House really happened)
* 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''.