List of The Simpsons Treehouse of Horror episodes
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Treehouse of Horror, also known as The Simpsons Halloween Specials, is a series of Halloween-themed episodes of the animated sitcom The Simpsons, each consisting of three separate, self-contained segments. These segments usually involve the family in some horror, science fiction, or supernatural setting and always take place outside the normal continuity of the show. Therefore, they are considered non-canon.
The original "Treehouse of Horror" episode aired on October 25, 1990, and was inspired by EC Comics Horror tales. From "Treehouse of Horror" (1990) to "X" (1999), every episode has aired in the week preceding or on October 31; "II" and "X" are the only two episodes that had aired on Halloween. Between "XI" (2000) to "XIX" (2008) and "XXI" (2010), due to Fox's contract with Major League Baseball's World Series, episodes had originally aired in November. "XX" (2009) and each Treehouse of Horror episode since "XXII" (2011) has aired in October, with the exception of season 32's "XXXI" (2020), which it was originally scheduled for October 18, 2020, but was pushed back two weeks later to November 1 due to the 2020 NLCS reaching game 7. This was the first time since "XXI" that a Treehouse of Horror episode aired in November. The same thing happened with season 35's "XXXIV" (2023) and season 36's "XXXV" (2024), which aired on November 5, 2023, and November 3, 2024, respectively.
The first 13 Treehouse of Horror episodes had all three segments written by different writers and in some cases there was a fourth writer that wrote the opening and wraparound segments.
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