- Art Evolution: This is the first episode of the season (broadcast-wise) to use digital coloring rather than the traditional ink and paint. The show would permanently shift to digital a few episodes later.
- The Original Darrin: Maggie Roswell returns to the roles she left during season 10.
- What Could Have Been: The episode originally would've started with a shorter opening sequence spoofing The Exorcist, with Reverend Lovejoy expelling a demon from Lisa, whose vomit creates the title card.
- The revised opening, a seance for Maude Flanders, originally featured more dialogue for Maude. Both these scenes can be found on the season's DVD box set.
Trivia / The Simpsons S 14 E 1 Treehouse Of Horror XIII