Marge becomes possessed by a monster when she tries to get rid of a scary book, Lisa proves the pen is mightier than the sword when she goes on a killing spree, and Homer learns that he is actually a robot.
Treehouse of Horror XXXIII
The Simpsons
for The Simpsons in Episodes Sorted By Show
Suggested by dynastiprimosfan
Not my idea, just wanted to popularize a little further.
