Henry devises a cheeky scheme to help his classmates get homework done.
When Mum accidentally throws out Henry’s Lucky Thing, is he doomed for misfortune?
Henry and Peter hate sharing everything, but can they do anything about it?
Henry and his friends aren't prepared for the havoc a magic wand can wreak.
When Dad’s plans to assemble a TV don’t go as expected, Henry and Fang step in.
Brian and Henry decide to be inventors, but someone could be out to sabotage them.
Henry faces a surprising rival when he runs for School Council.
If Henry stays quiet, he can have pizza for tea, but being silent is hardly his strong suit.
Can Henry be good long enough to attend a special event with Dad?
When Fang is keen to win the top prize at a local pet show, Henry reluctantly obliges.
Fang takes a thrilling adventure to retrieve Henry’s confiscated snotslimer.
Learning that the school doctor is giving sweets to her patients, Henry wants in.
Henry learns how life might turn out for him if he never grows up.
Henry’s doing his best to be a good son -- but he has ulterior motives.
Henry’s prank has Peter convinced that he’s discovered a new planet, but will the press buy the story?
Henry is stunned when it seems that Peter can predict his every action.
Margaret bosses Ralph into leading his own gang without Henry.
An overbearing boss takes over Henry’s new delivery service.
Mum and Dad are in for a rude surprise when attending Parents’ Evening at Henry's school.
Mum and Dad meet with Peter’s teachers, but Henry is the main topic of conversation.
Margaret introduces Henry to the life-changing art of how girls talk.
Henry makes a discovery that has him convinced he’s fit to be king.
When a dishonest author steals Henry’s life stories, Henry wants revenge.
Henry faces unlikely competition in Peter, who decides to try being horrid, too.
Peter is jealous when there’s finally something Henry can do better than him.
Henry’s new, improved version of a popular game isn’t as genius as he thought.
Margaret is even more horrid than Henry when she creates her own YouGroove channel.
The family is in for an adventure when they take a road trip using Peter’s new sat-nav.
Three, rare white birds appear at the Purple Hand Gang fort -- are they good luck or a cruel joke?
Henry faces surprising consequences after rewriting membership rules for the Purple Hand Gang.
Henry is terrified when Mum makes him a dentist appointment.
A silly sweater puts Henry into a situation he can’t worm out of.
Life is twice as horrid as usual when Henry wishes for a twin -- and gets one.
Henry discovers the downsides of technology when he tests a new device.
Margaret’s on a mission to build a grand treehouse, but Henry won't have it.
Mr. Soggington is determined to see Henry locked up, but can Henry be proven innocent?
Henry reluctantly attends a sleepover at Margaret's while Peter has some fun of his own at home.
When Henry opens the Hotel Horrid, he gets an unexpected, exceptionally cool guest.
Henry is utterly unprepared to compete in the Brainbox of the Year competition.
Mum and Dad's long-awaited plans for a romantic weekend away go horribly wrong.
Peter spends the weekend with Great Aunt Greta, who is convinced he is a teenager.
Peter reveals the true story about his role in an event from the past.