Starring: Terrence Hardiman, Frances Amey, Gunnar Cauthery, Thomas Szekeres
Episode #1.3 - S1-E3
Other mistake: After the Demon Headmaster has been drenched in goo on the TV show Eddy Hair ends the show and there is a shot of the children shouting his catchphrase, in this shot you can see Eddy's cameraman crouched on the floor at the bottom of the stairs looking injured and holding his arm. There's no explanation as to why. (00:20:49)
Episode #1.2 - S1-E2
Revealing mistake: Towards the end of the episode when Dinah, Lloyd and Harvey are walking to school you can see a man and a woman stood at the end of their driveway watching filming. (00:19:28)
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."