After Walter takes up origami as a martial art, Dennis scoffs and comes up with his own martial art, and so the two prepare to battle it out.

Inspired by the mayor's call to make Beanotown Green-o-town, Dennis tries renewable fuel sources to launch his space mission.

Dennis uses curtains as a giant sail, not knowing its specially for the kitchen and loses it to the Colonel.

In attempt to keep cool on a hot day, Dennis' gang dig their own pool in Dennis's backyard.

Dennis comes across a bundle of objects that inspire him to be a private investigator and begins searching for Gran's lost teapot.

Dennis goes to the fair with his friends and Bea, but the owners of the fair of spoiling their fun due to last years events, especially the bouncy castle operator.

Dennis' gang decide to make their own alien film. When Walter stumbles across them filming, he's convinced there is an alien invasion and raises a red alert in Beanotown.

The joke shop owner, Mr Har Har, needs Dennis's help to persuade his mother not to close the joke shop down. The gang decides to try and pass Mr Har Har off as a successful vet.

With one backstage pass for a Ratbucket gig, Dennis and his friends pass themselves off as Ratbucket, only for the real Ratbucket not to be able to play at his own concert.

Dad takes Dennis to his school reunion party, in an attempt to teach him to behave grownup, but it doesn't go as planned when Walter's dad renews his rivalry with Dad.

Visiting Gran in hospital, Dennis disguises Gnasher as a baby to evade detection, but Gnasher is taken away by the short-sighted Mr and Mrs Butcher.

Dennis tries to help Dad get a raise, but Dad ends up fired, so Dennis makes Scrimp's office seem incapable without Dad.

The police chief hires a super-efficient cop called Boot to replace Slipper, who tolerates no act of mischief. Teamed with Walter, Dennis tries to get Slipper back on the job.

Dennis hatches a plan to bail Gnipper imprisoned in Beanotown dog pound, by impersonating a misbehaving dog.

Dad agrees to buy Dennis the best skateboard there is if he can win a prize at the upcoming school award ceremony. The only prize that Dennis can try to win is the best behaviour prize, so he does everything he can to win the contest.

After a bet from Walter on the Dance Contest, Dennis trains Pie Face to be a dancer. Meanwhile, Dennis' dad tries to cure Gnasher of his fleas.

In an attempt to reclaim the park, Dennis and friends try to scare everyone with a 'pond monster.'

Dennis tries to get a birthday present by saying thank you to his relatives. However, because of Dennis' naughty personality, they take his attempts in a negative way.

Dennis and friends have a go at catching the Legendary Beanotown Pike, but when Walter hears about it, the game is on.

Mum is going to the yoga school and leaves Dad in charge. During her absence, Dennis, Curly and Pie Face try to make a pie, with disasterous results to follow.

To get his friends back from Walter's group, Dennis challenges Walter to a videogames battle.

After a wrestling accident, Gnasher swallows a canister of laughing gas at the vet's. Dennis, along with Gnasher hide in the conference centre, where dad gives a speech. However, the canister leaks, causing Gnasher to fart laughing gas and having everyone laughing.

For a school project, Dennis and Walter both build robots. However, during an accident, both robots merge, causing Dennis and Walter to defend the school.

During a camping holiday, Dennis, Gnasher and Dad meet Terry Tuff and get challenged to a nature survivor's challenge, ending with a race to the summit of Mount Beano.

Dennis and Co. have to control Pie Face's obsession with pies during the Pie Festival. Otherwise, they will be grounded.

To win a football match against Dennis' team, Walter fattens Gnasher up and brings in top striker David Peckham. But will this stop Dennis and team from winning?

On a school trip, Dennis finds out that he is descentant to a warrior tribe. He also discovers that Montanna Smith (a famous Indiana Jones-esque explorer and one of Walter's personal heroes) is actually a thief who's trying to steal the treasure of Dennis' ancestor. Will he be stopped before he gets his hands on the treasure?

Athena gets Gnasher envy when seeing a pampered version of Gnasher in a magazine and when she hears that Dennis owns an Abyssinian wire-haired tripe hound (Gnasher), she wants him. However, being an owner to Gnasher isn't all cracked up to be!

Dennis tries to get a first aid badge to get into a wrestling match. However, Walter's the judge and it's not going to be easy.

Dennis is made to attend a Neighbourhood Watch meeting by his parents. This, however clashes with a jam session with Curly and Pie Face.