List of The Simpsons Treehouse of Horror episodes
This is a list of Treehouse of Horror episodes from the animated television series The Simpsons. Treehouse of Horror episodes have aired every year since the second season (1990). Each episode has three separate segments. These segments usually involve the family in some horror, science fiction, or supernatural setting. They always take place outside the normal continuity of the show and are therefore considered to be non-canon.