The Demon Headmaster - Series 1 - Episode 4

Drama serial based on `The Demon Headmaster' and `The Prime Minister's Brain' by Gillian Cross. The latest craze is `octopus dare' and junior computer brain of the year competition. Dinah is a natural contender, but her behaviour becomes very odd. Could it be that the evil headmaster is up to his new tricks in a bid to take over the world?