THE SIMPSONS: The "Island of Dr. Hibbert" vignette from the "Treehouse of Horror XIII" episode of THE SIMPSONS on FOX. THE SIMPSONS ™ and © 2002 ALL RIGHTS RESERVED.

THE SIMPSONS: "The Island of Dr. Monroe" has a definite effect on THE SIMPSONS in the annual Halloween trilogy. "Treehouse Of Horror 13" airs Sunday, Nov. 3 (8:00-8:30 PM ET/PT) on FOX.

THE SIMPSONS: Homer clones are everywhere on THE SIMPSONS episode "Treehouse Of Horror 13" airing Sunday, Nov. 3 (8:00-8:30 PM ET/PT) on FOX.