"Treehouse of Horror XIII" is the first episode of "The Simpsons"' fourteenth season and the thirteenth Halloween episode. It first aired on the Fox network in the United States on November 3, 2002, three days after Halloween. It is the second Treehouse of Horror to have a zombie related segment, and the last Treehouse of Horror to have three separate writers credited for writing three stories (starting with "Treehouse of Horror XIV", only one writer is credited for writing the three stories). It is also the first Simpsons Halloween episode to be titled "Treehouse of Horror" in the opening credits, as all prior Halloween episodes were referred to as "The Simpsons Halloween Special".