This is the last Halloween Special to use bridging sequences between segments.
First appearance of Üter. He was conceived as a one-time joke, but reappeared in later episodes because David Mirkin felt he was "such a perfect stereotype".
"Terror at 5½ Feet" was inspired by Nightmare at 20,000 Feet (1963), in which William Shatner's character is inside an airplane watching a gremlin tear apart the wing. David Silverman watched the episode to get inspiration for Bart's facial expressions. This episode was remade for Twilight Zone: The Movie (1983), with John Lithgow taking over for Shatner. Nancy Cartwright appeared in a different segment in that film.
Bill Oakley loved the idea of Flanders being the Devil because he is the one you would least expect. He also thought Harry Shearer did a good job of playing Flanders in a much darker way, while remaining very true to the character.