Writer Kathryn M. Drennan reveals that in the original script, she only described the barnyard ghost as all legs and no arms. Animators added the musical instruments and such.
Mayor Lenny is mentioned twice in the episode.
Peter flunked music in high school.
The voice actors were recorded on October 31, 1986.
Janine's Manhattan Mornings newspaper mentions a Yankees vs. Dodgers Major League Baseball game and indicates it is a Friday and March 1986.