The demon headmaster cast and summed up

Cast in order of appearance
Zac
Trafon slitheen (The head)
Fipsel slitheen (Mrs Harrison)
Racsonfess slitheen
Richard
Georgia
Conner
The doctor
Harry
Kaylie
Bradley
Beth
Mr. Roberts
Catherine
Tron slitheen (Mr. Roberts!)
Bert
News reporter
Zac's mum
Mr. Ashmer

The story starts just after episode 1 Conner when Zac is returning home. He sees another ship flying overhead, it was similar to the ship that had crashed into Big Ben 4years ago. On board are several slitheen including Racsonfess, Fipsel and Trafon. They want their revenge on the doctor! They're going to get closer to the doctors companions first by taking control of the school Conner goes too and getting closer to Georgia's brother. Richard goes to answer the door of his house and finds a slitheen!! The credits roll!

Zac, Kaylie and Harry go to St. Marks school and they are going into their english class talking about trips and the headmaster being mad. Mr. Roberts a supply teacher tells the class that the head is a green alien and that most of the fat teachers are too. Tron slitheen Trafons son is disguised in a skin suit but who's? Mr. Roberts is called to the head's office and the three students fear the worst. Then the doctor, Conner and Georgia arrive. Georgia goes off to visit her brother while Zac and Harry tell the doctor he's being noticed. They have been researching. The doctor decides to come back tomorrow and investigate.

Zac Kaylie and Harry meanwhile decide to investigate at night. They are walking down a corridor when someone grabs Kylie, it's Bert who says he thought they were burgalars. Then Mr. Roberts comes running down the corridor saying he's being chased so the group run for the front doors. They realise Bert's lagging behind so Mr. Roberts turns to go back but comes face to face with a slitheen. Kaylie chucks a pen knife at the slitheen who falls over. Meanwhile Georgia and Richard are watching TV she is staying over there for the night. On the news it says Conner has returned home. Meanwhile Richard doesn't seem to be on the ball. The next morning the doctor goes to investigate the kitchens with Harry where there was some kind of explosion. Conner refuses to believe that there are aliens and goes off in a sulk to the toilets where he meets Bert who cheers him up.

Zac and Kaylie go to assembly which they have 5 times a week, odd eh. The head seems to hypnotise them and says for them to train for a war. So the students obey without question. Back in the kitchens the doctor finds a pool of vinegar on the floor and green gunge splattered around the room. He is sure of it the teachers are slitheen! The doctor manages to un-hypnotise Zac and Kaylie who fill up spraycans with vinegar. Meanwhile Georgia realises her brother could be an aliens and confronts him. But then Racsonfess slitheen appears out of a wall. Telling her she's going to die. Zac confronts two teachers who start unzipping themselves, but then from behind Zac another teacher grabs his spraycan. The three teachers un-mask and chase Zac, while Kaylie meets Bert. Thinking Bert's a slitheen she sprays him with vinegar and he runs off but then she gets chased by another slitheen. The doctor and Harry are in the hall and Trafon slitheen explains how they defeated the magnet warriors and how they wanted revenge on the doctor. It ends with Georgia being cornered and the doctor and Harry beginning to be hypnotised themselves!!!

The story continues in Slitheen school!