Every fall fans of The Simpsons look forward to the Halloween special known as the "Treehouse of Horror (fill in the Roman numeral)." The Roman numeral is the current season minus one, because the very first season of The Simpsons didn't have a "Treehouse of Horror" episode. Browse this gallery of "Treehouse of Horror" pictures from recent seasons of The Simpsons.
 "Treehouse of Horror XXI" |  "Tweenlight" |  Edmund |  "Master and Cadaver" |
 "Roger" |  "War and Pieces" |  "Treehouse of Horror XXI" |  Moe's Tavern |
 Zombies |  Poor Skinner |  "The Grand Pumpkin" |  "Treehouse of Horror XIX" |
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