In part one, Billy and Mandy return to the school of sorcery to protect Nigel from the evil Lord Moldybutt. In part two, Billy and Mandy are kidnapped by the Underworld circus owner because in the Underworld humans are valuable circus freaks.

Cast: Greg Eagles, Richard Steven Horvitz, Jeff Doucette, Pat Fraley, Jennifer Hale, John Kassir, Jake Thomas, John Vernon, 'Weird Al' Yankovic