Dennis is forced by his mum and dad to go for a haircut at Slasher Brown (Who happpens to be Walter's uncle)'s barber shop, and ends up being chased by the World Federation of Barbers.
When the Dog Training School promises Dennis's father that they can turn Gnasher into a perfect pooch, Dennis and the gang go on an undercover mission to rescue him, and discover the school is not what it seems...
It's a race against time! Dad's determined to get Dennis in the bath, but the Ministry of Defence wants Dennis left unwashed, for his smelly socks are their latest secret weapon!
When Dennis and the gang volunteer to do a days work on the SS Rustbucket on a race around the Cape of Good Hope, they find themselves swallowed alive by "Dopey Mick", the daftest whale of the 7 seas.
When the chief of the police fires Slipper for not being able to stop Dennis's trouble-making about town, it looks like it will be the end for Dennis's menacing when the post of Sergeant is replaced by a seemingly unbeatable robot! Has Dennis met his match, or will his new found friend, the loopy female inventor Flossy save the day?
When two wanted criminals see Dennis's amazing ways of making mischief, they trick him into doing his biggest blow yet...robbing the Beanotown bank!
When Gnasher is forced to stay in bed due to a toothache, Dennis cheers him up by telling him a story, but not just any old story...why just read from a book when you can mix them up and make your own special version? We see Dennis & Gnasher going on an adventure in a mystical land, meeting their friends and enemies on the way...
When aliens with the ability to disguise themselves as anything arrive on earth disguised as television sets and seeking help, Dennis and Gnasher are keen to help out, on the understanding that they can help him too, by using their disguises for menacing!
Dennis's dad is to sick to come to work, so Dennis hands in a sick note to find out what Dad's work life is like...only due to a mix-up Dennis & Gnasher find themselves instead at the Secret Agency next door where they are mistaken for Dirk Cool, a secret agent who is a master of disguise dressed as a 10 year old boy and his dog. Next thing the duo know, they are being fired of in a space pod on a mission to stop a crazy dinner lady turn the whole world into 10 year olds unless they eat her rotten dinners! Can Dennis and Gnasher save the day?
After some trouble with Dennis, Mum and Dad join an adult education class to understand children, only to understand the tutor is a bit loopy! Meanwhile Dennis runs his own class among his friends titled "How to Understand Grown-ups".
Hiding from the wrath of Dad after a chaotic morning (aided by Granny), Dennis comes across what he thinks is his Dad's diary, and realises that in his youth he was far from the respectable young man he claimed to be. Soon, the diary entries make Dad a reluctant celebrity, and with a Hollywood film director making a film based on the book, Dennis discovers that his antics are no longer seen as threatening.
When The Colonel organises an outward bound weekend in the woods, Dennis and Gnasher decide to tag along and cause mayhem for a laugh, but things are not longer a joke when they learn that Genghis Kong, an escaped circus gorilla, is on the loose in the woods and has somehow taken an interest to Dennis's granny.
Eccentric millionaire Sir Fitz-Patrick Flush promises to give a million pound cheque to the citizens of Beanotown if they can live without television for a whole week. Unfortunately, this doesn't go down well with Dennis and pal's plans to watch the week-long marathon of their favourite show Nick Kelly.
Humiliated by Walter during a hectic game of tag (which soon escalates into chaos when adults begin to get tagged), Dennis decides to compete against him in a Blue Peter painting competition, with a ‘little help’ from a certain four-legged friend…
Dad is incredibly determined that the Menace family’s holiday will be incident-free, but an animal-hating guest-house owner, Dennis’ usual mayhem, and a suspected burglary back home do very little effort to liven up his spirits…
When Dennis beats Walter in a racing car competition, The Colonel is determined to find what made his engine-free vehicle tick, whilst Mum prepares herself for a driving test with the help from Dad, a runaway dodgem car, and Gnasher’s favourite squeaky bone…
The discovery of a large stone-age mural in the Menaces’ front garden causes Dennis to daydream on what it would be like to live in prehistoric times… and to somehow witness the creation of the wheel.
Dennis’s plans to create chaos at the school parents’ evening are seemingly thwarted when his parents arrange The Colonel to baby-sit for them and tell-tale Walter comes to stay for the night, but when a top-secret weapon is aimed at the school, only Dennis knows how to save the day…
Dad’s ghastly aunts return from their 20-year long holiday expedition ten years earlier than expected, and quickly prove themselves to be a big match for Dennis with their "Etiquette Assault Course". But when his attempts to scare them out of the house only leads to an extended stay, he’s determined to discover the truth about these unwanted houseguests.
The Menace family are swindled by ruthless tycoon Clint Katzenberger, who tries to root out an oil field beneath their house. Desperate to get their home back, Dennis turns to Katzenberger’s sworn enemies, The Green and Friendly Pressure Group, for help, but is that thick black liquid really oil?
A new Mega Mall suddenly opens in Beanotown, but Dennis and Gnasher quickly discover that things are not right when all the smaller shops close down and everyone begins acting strangely. Unfortunately, Dennis too falls under the Mega Mall’s hypnotic spell, leaving Gnasher and his animal pals to rescue Beanotown.
Gnasher finds himself hunted down by sinister rat catchers when the Colonel’s ‘adventurer’ cousin Hugo claims that the Absynnian Tripehound is a dangerous form of ‘super-rat’. A heated court trial ensues to prove Gnasher’s canine ancestry, but is Hugo really the world traveller he claims he is?
Dennis’s search for the existence of the Tooth Fairy takes him (along with Gnasher and Pie-Face) into the farthest reaches of his mattress, where he ends up in a war zone between the Fairy Freedom Fighters, a bunch of goblins, and their familiar-looking ruler…
Mum’s new job at the art gallery is threatened when a group of scurvy dogs steal the gallery’s main attraction (which looks suspiciously like Walter) as a new figurehead for their ship. It’s up to Dennis and his crew to battle the pirates and return the stolen statue.
Dennis competes in a race against Walter to become school prefect, and is determined to make it to the building early for once… despite the fact everyone has had the day off due to a snow blizzard. Soon, things take a turn for the abominable when a furry giant begins following them…
Expecting a ‘Model Space Racer Jet Set Kit’, Dennis and Gnasher instead receive Jacques, a hulking, information-guzzling fellow who becomes a huge hit with the school and wins the heart of Matilda. However, not everyone in Beanotown takes an instant liking to Dennis’ new monstrous mate…
