Horrid Henry knows the winning number for the treasure hunting game at the school fair and he's desperate to get his hands on the prize. Unfortunately, someone else has picked the winning number.
It seems that everyone except Henry has lost a tooth and had a pay-out from the tooth fairy. First, Henry tries his best to lose a tooth, but then realises it'd be easier to trick the fairy.
Horrid Henry isn't happy when he finds out that Aunt Ruby and Stuck-Up Steve are coming for Christmas. A mix-up with the tags on the presents complicates matters further.
Henry's really looking forward to his school trip - a visit to the local ice cream factory. So he's none too pleased to find out that it's closed and they're off to the museum instead. But the local mummies and dinosaurs liven things up a bit and when he manages to frame Peter too, well it's almost a perfect day.
Henry is sent to his room for ruining Peter's painting. Later, Henry tricks Peter into painting everything blue to avoid an alien invasion and gets him sent to his room.
Perfect Peter is tired of being ignored when he is well behaved, so he decides to be horrid like Henry. Unfortunately, he still doesn't get noticed as Henry gets blamed for everything still.
Horrid Henry makes himself sick to get out of a spelling test at school. With Peter and Mum genuinely unwell, it's not long before Henry regrets skipping school.
Henry and Peter get trapped in the basement. Henry's true feelings for his little brother are exposed when he saves Peter from a falling set of shelves and lands himself in the hospital.
The school has two tickets to the Ashton Athletic vs. Manchester United game so Miss Battle-Axe decides to hold a game of football and award the tickets to the player of the match.
Mum and Dad take Henry and Peter camping in France, but this isn't exactly Henry's idea of fun. Can Henry make his parents and Peter feel the same way?
Henry puts Peter's bunny toy in his class' time capsule. When he goes to get it back, he finds the capsule empty. Can Henry uncover the time capsule thief and retrieve the bunny?
Henry is after a new pair of stylish trainers, but misbehaves constantly at the department store until there's no way his mother will buy them for him.
Horrid Henry accidentally wears a pair of Great Aunt Greta's underpants to school on the day that his friends are looking for revenge. Can Henry keep his trousers up all day?
No-one's more excited than Henry when the Queen comes to visit but her visit doesn't turn out quite the way Henry has imagined it. Henry and Peter have to be very careful not to get sent to the tower.
Horrid Henry alters his test results on Miss Oddbod's computer and gets entered into a brain-box of the year competition which requires a lot of extra studying.
Time for a bit of family bonding, as Dad takes Henry, Peter and friends to the aquarium for a bit of fishy fun. As usual, Henry's after something else though, as the shark's tale turns into a bit of a nightmare.
Given the choice, Henry would, of course, rather do karate than dance class. But Mum can't be persuaded so Henry has to show that karate can be just as beautiful as dancing, if not even better.
Fluffy the cat runs away from home, leaving Perfect Peter distraught. Horrid Henry finds out where the wayward cat is, but his parents won't believe him.
