Mitchell is bitten by a sick deputy head and, every time the school bell rings, transforms into a disciplinarian wereteacher.

When Templeton's Science Fair attempt to blast into the cosmos backfires, he accidentally instigates a full-blown alien invasion - by aliens that seem remarkably familiar and have come to pay homage to the creator of the Universe... Templeton?!

Mitchell must pass the 'Hardest Maths Assignment Ever'. He cheats and ends up earning the mythical grade of 101%, breaking maths, and the world as we know it in the process. The kids' only hope in fixing this is a boy genius who was frozen years ago and has not been properly defrosted.

When Becky coaxes a wilting plant back to life in the old Strange Hill greenhouse, she gets more than she bargained for with an outbreak of plantlike PE teachers threatening to exercise the world into submission. Only Mitchell's sarcastically planted chicken nugget beast can save the day.

A new school security system is installed - and the cameras seem to record what happens in the future. When Templeton becomes security monitor and goes mad with this incredible, all-seeing power, the very existence of Strange Hill is threatened.

Mitchell causes havoc when he plays too many pranks on April Fool's Day - and unleashes a dormant Beast of Embarrassment that lives under the school.

Mitchell accidentally erases himself from history after deleting his school record, and has fun with his anonymity. However, when his friends forget him and he begins to disappear, he calls on the only person who can remember him in a bid to reboot his existence.

It's Valentine's Day and while attempting to sabotage Abercrombie's zero tolerance to romance, the trio discover a portal to the inside the headmaster's brain. What at first seems like the best thing ever soon turns into a nightmare as the bullies gain control of the headmaster. The only way to stop them is to test the old adage - the heart rules the head.

The friends find a lost exchange student on a mysterious desert island in the school pool, but the boy's size leads Abercrombie to worry he will destroy the building.

When Mitchell is issued a strange simulation baby doll to teach him responsibility, his first reaction is to bin it. But it keeps coming back and he soon realises that the doll is alive. From apathy to panic, and finally to parenthood, Mitchell soon appreciates that having Mitchell Junior around might not be so bad after all.

Becky, Mitchell and Templeton stumble across an underground lair that was once home to a league of 15th-century superheroes. Unfortunately, they also release Ye Olde Righteousness League's arch-nemesis...

With the annual Strange Hill Spring Festival approaching, Mitchell drives the music teacher mad and the kids get a mysterious new teacher who may have a deeper connection to the ancient event than the pupils realise.

Mitchell's desperate attempt to start his Christmas holiday early is scuppered when he accidentally traps everyone in the school.