The Demon Headmaster was the Principal that nightmares were made of. He would remove his glasses and hypnotise his pupils by saying 'look into my eyes'. The students would then act like robots and do what ever they were told, but there were a small gang of pupils called SPLAT's who were determined to resist the Head's powers. The Demon Headmaster was originally a series of books by Gillian Cross. However, they were later adapted as a television series starring Terrence Hardiman as the Demon Headmaster.