We get another brand-new episode of The Simpsons! Tonight, it will deliver the second "Treehouse of Horror" installment of season 36, with The Simpsons ' time leaping back to the 1950s.

Not so with the Simpsons. They've been making their Treehouse of Horror specials for 27 years now, an annual trilogy of tales that satire horror movies, surreal TV, and even classic literature.

The series will recast Hayden's roles for future episodes. Hayden's last episode will be "Treehouse of Horror Presents: Simpsons Wicked This Way Comes," which will air on Sunday, November 24.