Fed up with Dennis pulling the wool over Mrs Creecher's eyes, Walter orchestrates a robot to take over Class 3C - with disastrous results.
A bungled attempt at a stunt leads to Dennis accidentally becoming a Beanotown celebrity. But his moment of fame is cut short by Walter's cat, who can play the piano. Dennis has to stage the best stunt yet to gain back his audience.
The gang are fed up with dinner lady Olive's inedible school dinners. They learn she used to be a singer and try to persuade her to change career.
Dennis discovers the school's Confiscatorium, a secret place where all confiscated goods are hidden.
Dennis must escape detention and Bash Street School to make the Beanotown Brawny Bean Race before Walter wins it.
Dennis meets his hero, Grizzly Griller, who is planning a dangerous journey. But when Grizzly's fear gets in the way, Dennis takes his place.
Pieface steals Professor Von Screwtop's Pastry-based Intelligent Espionage unit (PIE) after forming a strong bond with the pie-shaped robot.
Dennis is determined to outshine Walter in Class 3C's 'Biggest Veg' competition, but his methods bring trouble upon the school.
Dennis gets into a fluffy mess when he runs into Von Screwtop's hadron collider with the professor's pet hamster, Galahad.
Dennis discovers that Ralf the janitor is the legendary Prankmaster General and is told he could become his successor. Only Walter stands in the way.
Wilbur passes a law to increase the healthy eating in Beanotown, replacing all foods with peas...of the mushy variety. The gang must avoid the people of Beanotown who are rapidly transforming into Zompeas, from the over consumption of the addictive green goo.
Walter attempts to sabotage The Dinmakers' chance of reaching fame. He will stop at nothing - even wearing a frock, becoming Wanda and pretending to LOVE Dennis in order to break up the band.
Dennis will stop at nothing to prevent Pieface from failing Mrs Creecher's maths test. He persuades the gang to use Professor Von Screwtop's mind-swapping device.
The gang go on an adventure in search of the Beanotown Yeti, but when the Yeti grabs JJ and makes a run for his cave, Dennis and his chums must come to the rescue.
Dennis persuades Pieface that Paul is an undercover super hero. Gnasher, JJ and Rubi must go along with the story and help Dennis to 'prove it'.
The world famous Wonder Sausage is on show in Butch Butcher's shop. Walter realises the sausage has a strange hypnotic effect on Gnasher so uses it to make him follow his every whim.
Gnasher finds a Gnashersaurus Rex thighbone while digging in Beanotown Park. A long lost relative. It's not long before Walter and Dr Pfoofleffer hatch a plan to create a whole new living dinosaur from the bone.
Thinking Rubi's Dad is lonely, the gang set up dates for Professor Von Screwtop with Beanotown's most eligible ladies. But only Dr Pfooflepfeffer seems the perfect match, or does she really only want him for his atomic toaster?
Pieface's all-time hero, Cherry Bakewell, is coming to Beanotown to judge the annual bake-off.
Dennis accidentally clones himself and uses clone Dennis' eagerness to help, to do all his chores and abide by the rules. All is going to plan until Walter realises what has happened and unleashes a clone cat army on the den.
Dennis is mistaken for a Beanotown Baddie while in disguise to sneak into 12A film. At first, Dennis loves being treated like a celebrity, but as things begin to go awry his friends have to save him by revealing his real identity.
When Dennis decides to use Professor Screwtop's time machine without reading the instructions he ends up starting a chain of disastrous events.
When poor Gnasher is laid up, wearing the 'collar of shame' Dennis takes Rasher to school instead and disguises her as an exchange student. What Dennis does not expect is that Walter will take a shine to the new girl.
Walter and Clawdia are causing mischief for the gang by framing Gnasher for chewing things he shouldn't. It's only when the mayhem gets out of hand that Dennis smells a rat, or rather a cat.
Pieface laments that Paul is looking peaky and needs a holiday. Dennis has a plan. But its only when Walter kidnaps Paul that he realises his chips are down and he needs to get the gangs help to put things right.
Gnasher gnashes Walter's portrait so he retaliates with a titanium sausage leaving Gnasher toothless, miserable and without his mojo. Dennis and the gang will have to stage a heist to 'borrow' some diamonds until Gnasher's teeth grow back.
Worried that Walter will beat his record of the Beanotown Freewheeler Derby, Dennis creates a faster cart but loses control and injures himself. It is up to Rubi's wheelchair know how and Dennis' super-speedy carting skills to win the race.
There's a werewolf-type creature on the prowl and suspicion falls on Gnasher. Dennis has to prove his best pal's innocence as the full moon shines down on Beanotown.
Walter launches his own mega-dull, yet hypnotic TV channel with an antenna booster that swamps all other transmissions. Rubi helps Dennis set up his own station with a more powerful booster, and the ensuing battle between Walter and Dennis begins.
Gnasher gulps down Dennis' permission slip for the school trip. There's only one thing for it - they need Prof Von Screwtop to use his shrink ray to shrink them down to bite size humans so they can travel on a sausage into Gnasher tummy and retrieve the slip.
Pieface's first sleepover in the Den is troubled by spooky tales of a frightening Fangtom AND Walter with a demolition gang determined to flatten the Den.
The class dig up a mysterious time capsule, which sends them into a frenzy to find the hidden treasure before Walter or a greed-crazed Paul the Potato can thwart them.
When Dennis and the gang think they've caused Ralf to 'get the sack', they're determined to make his last day at Bash Street School epic by setting up the greatest mega-prank Ralf's ever known.
Dennis recruits Grizzly Griller to help make sports day more extreme, but as he and JJ get competitive against each other, who is sabotaging both their chances of winning?
Power-mad Alien Empress Miasma takes control of Gnasher from the inside and uses him in her attempts to take over planet Earth. But when Miasma breaks out of Gnasher into Beanotown for real and Walter helps her grow in size, mayhem really takes hold.
Dennis and the gang help Walter's ex-pet croc, Crunchzilla to get in touch with his wild side. Walter does his best to thwart them, as he needs to keep the Croc tame in the hope of retrieving his Father's limo keys, which Crunchzilla has swallowed.
A snake bite causes Grizzly Griller to forget all his survival know-how, so it's down to his greatest fan Dennis to help him re-learn his survival skills so they can all make it safely back to civilization.
Dennis and the gang train Bertie in the art of standing up to people so he can rebel against Walter's bossiness - but they train him too well and he becomes a dangerous rebel without a clue.
Grizzly Griller finds his ultimate animal sidekick for an action-packed feature film - Gnasher!
Dennis needs to pull off a magnificent stunt to save the skate park from closure so Gran gives him the skateboard of the legendary 'Kendo 360' - but the special board goes missing at the worst possible moment.
When Gran's Harley gets impounded, Dennis thinks she's lost her groove and given up on her thrill-seeking ways. In trying to help her, Dennis accidentally ages himself up into an Old Man Dennis, who teams up with Gran to prove you're never too old to be a rebel.
Dennis is in the frame for a crime he didn't commit, and Mrs Creecher's new super-powered Tech Specs mean she can suddenly see WAY too well: she teams up with Sergeant Slipper to track down "fugitive Dennis".
Rubi gets a place in a Summer School for Super Smart Kids, which turns out to be a trick to exploit her technical brilliance and get her unwittingly working for WilburCorp, giving Walter the power to control clouds.
The Gang spot what appears to be a meteor, through Screwtop's mega-powerful telescope. It turns out to be an early space-invention of the Professor's, hurtling back towards Earth, on collision course with Beanotown.
JJ's so keen to get Dennis the new bike she thinks he's desperate to have, that she gets caught up in a "you scratch my back" predicament with Walter, surreptitiously feeding him security information that could lead to a jelly-blasting rampage.
Pieface inadvertently rescues Walter and Bertie from peril with Ralf and a rogue digger. Dennis leads the town in celebrating Pieface Day but doesn't listen when Pieface tries to tell him its all one big misunderstanding.
The gang's efforts to help JJ master the ancient martial art of Blamjitsu are thwarted by Walter's plans to capture the Beanotown Yeti - whom they all think is a Blamjitsu Master, and guardian of the mystical Gloop of Greatness.
Crusty the Robot Pie Spy has been hacked by Doctor Pfooflepfeffer and is sending her photos of Screwtop's latest inventions so she can claim them as her own.
The gang get lost in the woods and stumble into a Land of Lost Things, where Gnasher gets "dognapped" by a Gnashersaurus Rex which has lost its beloved egg.
Gnasher gets sent to Dog Obedience School after he inexplicably gnashes Mrs Creecher's saxophone. When a Screwtop invention gives Dennis the ability to understand animals, he's convinced the "Chatterbox" is Gnasher's key to freedom.
A massive Beanostalk sprouts up in Beanotown, taking all the gang’s Christmas stuff - and Gnasher - up beyond the clouds to a land of giants! Dennis and the Gang bravely climb up to Ginormotown, determined to find Gnasher and bring Christmas back home.