Treehouse of Horror XVIII
The Simpsons Season 19 Episode 5 (11/04/07)
Recap
"E.T. Go Home" - In this send-up of E.T., Bart finds Kodos (who is hiding from the government) and helps him obtain devices to contact his home planet, but Kodos' intentions are proven to be murderous.
"Mr. and Mrs. Simpson" - In this send-up of Mr. & Mrs. Smith, Homer lives a double life as a government assassin, but discovers that Marge is one too and must eliminate her after she botched his attempt at assassinating Kent Brockman.
"Heck House" - In this send-up of Se7en, Ned Flanders turns the church into a Hell house and asks God for devilish powers so he can teach the children the consequences of committing the seven deadly sins.