Trivia: The show is adapted from four of Gillian Cross' "Demon Headmaster" novels. The first half of the first series is adapted from "The Demon Headmaster", the second half is adapted from "The Prime Minister's Brain", the second series is adapted from "The Demon Headmaster Strikes Again" and the third series is adapted from "The Demon Headmaster Takes Over."
Trivia: The music used for the Octopus Dare computer game is an 8-bit rendition of the show's main theme tune.
Trivia: "The Demon Headmaster" is actually only a Headmaster for the first three episodes of Series 1.
