Peter has had enough of Henry's horridness.

Henry proves the director of the movie that his friends have the talent to be in the movie.

Mum's Biscuits are a big hit with Henry, and he's determined to know what the secret recipe is.

Mum wants Henry to not be horrid for a week.

Henry imagines if his parents were Perfect, but soon regrets it.

Henry goes to a Secret Club sleepover at Margaret's house.

Fang is challenged by a Boodle Poodle.

Miss Battle-Axe is acting very weird and Henry and his classmates see if Miss B has been controlled by an evil mastermind.

Henry is forced to be in The Happiest Family Contest until he hears that the grand prize is an island getaway.

Henry goes to work with Pimply Paul delivering the milk.

Henry has been brought face-to-face with Margaret.

Henry borrows Ralph's phone and it gets confiscated.

Rude Ralph is missing, and Henry is desperate to find out where he's gone.

Henry isn't impressed that it's his birthday again.

Dad decides to get Henry a Saturday Job cleaning up the Park.

Henry and Dad think that going fishing is better than going shopping.

Great-Aunt Greta babysits Peter and Henry while their parents are out for the weekend. However, Henry is up to something great and horrible.

Henry saves Miss Oddbod's Cat, but Peter takes the credit.

When Henry's Dad gets a new job across the country, Henry's family has to move away from Ashton.

Henry and Steve have a plane battle.

Henry and Margaret start a fashion show to sell Henry's old clothes.

Henry's latest prank leads to his entire class getting detention, and on the same day as an important Ashton Juniors football match!

When Miss Oddbod suggests to "sell the school", Henry and Margaret take it too seriously.

A competition between Peter and Henry happens when Henry becomes a recycling ambassador.

Henry thinks that the visiting Bossy Bill is making Peter's life miserable.