The Demon Headmaster (Early 1996) - Dinah Glass moves in with the Hunter family and starts going to the same school as her foster brothers Lloyd and Harvey. It's not easy, as they seem to hate her, and school is really strange. Pupils suddenly talk like robots and do weird things, even Dinah finds herself acting oddly. She's sure the headmaster has some kind of power over them, and is determined to find out more. But the Demon Headmaster is equally determined to stop her!.
The Demon Headmaster Strikes Again (Late 1996) - Dinah's father is headhunted for a new job at the Biogenetic Research Centre and who should be the Director, but the Demon Headmaster... This time is lust for power sees him meddling with evolution itself. The consequences of his evil schemes will be deadly if the SPLAT gang doesn't act and fast as The Demon Headmaster is in charge of a scientific research centre and has created an Evolution Accelerator, a machine to speed up the evolution process and produce the perfect human. But for this he needs Dinah's DNA, and then to put her into terrible danger to test his theories.
The Demon Headmaster Takes Over (1998) - Dinah and her brothers are pretty sure they're rid of the Demon Headmaster once and for all. When people start dismantling the research centre Dinah contacts Professor Claudia Rowe, who's an expert on artificial intelligence. With Dinah's help she saves some of the precious materials and they become friends. Then weird things start to happen. Libraries start closing and their books are taken away. Telephones stop working, and there is no internet access. People start talking like robots, even Claudia Rowe and more and more of them seem to be wearing strange badges. It all adds up to one thing: the Demon Headmaster must be back. Dinah's search leads her to the university where she finds him developing a Hyperbrain, a computer with superhuman intelligence and deadly potential. Suddenly she's trapped. Is there any way to foil his plan?.....moreless