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Season guide

Dennis & Gnasher: Series 1

52 episodes Premiered Sep 7, 2009 Updated Sep 27, 2026
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Season 1 Episodes

Episode Guide

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Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

94%
Mytharc (3): Crucial lore & season climaxes
Core (49): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

The Way of Den-Do

Sep 7, 2009 · 10 min

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.

S1·E2 Core

Smelling of Roses

Sep 8, 2009 · 10 min

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

S1·E3 Core

Curtains for Dennis

Sep 9, 2009 · 10 min

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

S1·E4 Core

Splash!

Sep 10, 2009 · 10 min

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

S1·E5 Core

The Mystery of the Missing Teapot

Sep 11, 2009 · 10 min

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

S1·E6 Core

Castle in the Air

Sep 14, 2009 · 10 min

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.

S1·E7 Core

Aliens Among Us

Sep 15, 2009 · 10 min

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.

S1·E8 Core

No Joke

Sep 16, 2009 · 10 min

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.

S1·E9 Core

Dennis V.I.P

Sep 17, 2009 · 10 min

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.

S1·E10 Core

Bad Dad

Sep 18, 2009 · 10 min

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.

S1·E11 Core

Gnasher in Nappies

Sep 21, 2009 · 10 min

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.

S1·E12 Core

Rubberbands and Paperclips

Sep 22, 2009 · 10 min

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

S1·E13 Core

Boot

Sep 23, 2009 · 10 min

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.

S1·E14 Core

Breakout

Sep 24, 2009 · 10 min

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

S1·E15 Core

Eyes on the Prize

Sep 25, 2009 · 10 min

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 p

S1·E16 Core

Dance of the Seven Pies

Sep 26, 2009 · 10 min

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.

S1·E17 Core

The Pond Monster

Sep 27, 2009 · 10 min

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

S1·E18 Core

Dennis' Thank-you's

Sep 28, 2009 · 10 min

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.

S1·E19 Core

Fish Tale

Sep 29, 2009 · 10 min

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

S1·E20 Core

Masters of the House

Sep 30, 2009 · 10 min

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.

S1·E21 Core

Game On

Oct 1, 2009 · 10 min

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

S1·E22 Core

All-in Menacing

Oct 2, 2009 · 10 min

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, t

S1·E23 Core

Attack of the Walterbot

Oct 3, 2009 · 10 min

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.

S1·E24 Core

Great Outdoors

Oct 4, 2009 · 10 min

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.

S1·E25 Core

No Pies for Pie Face

Oct 5, 2009 · 10 min

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

S1·E26 Core

Dog Tired

Oct 6, 2009 · 10 min

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?

S1·E27 Core

Dig This

Feb 1, 2010 · 10 min

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 person

S1·E28 Core

The In Crowd

Feb 2, 2010 · 10 min

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.

S1·E29 Core

First Aid Dennis

Feb 3, 2010 · 10 min

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.

S1·E30 Core

Rock And A Hard Place

Feb 4, 2010 · 10 min

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

S1·E31 Core

Horsey Havoc

Feb 5, 2010 · 10 min

Dennis breaks Bea's toy horse, so Dennis is searching for a new one to cheer her up.

S1·E32 Core

Grounded

Feb 6, 2010 · 10 min

Dennis is grounded on the first day of the summer holidays, but Dennis doesn't manage to stomach it. But the town isn't having him sneaking out of home.

S1·E33 Core

Double Act

Feb 7, 2010 · 10 min

Gnasher and Gnipper enter a dog show, regardless of Walter saying they don't have true talent. He wants Athena and Miss Mini Wuff to win, but Walter has just underestimated Gnasher

S1·E34 Core

The Curse of Madam Gigi

Feb 8, 2010 · 10 min

To have Dennis be kind to him, Walter disguises as fortune teller Madam Gigi to warn Dennis that if Walter gets hurt, he "will get his just dessert."

S1·E35 Core

Random Access Mayhem

Feb 9, 2010 · 10 min

There's a new computer system which keeps data for the school which works using a memory stick. This gives Dennis an idea, but it makes Walter suspicious.

S1·E36 Core

Treehouse Treason

Feb 10, 2010 · 10 min

Gran's hurt her foot after trying to build a pigsty for her pet pig, Harley. She makes Dennis deal with Harley and then starts living in Dennis' tree house and Dennis isn't happy a

S1·E37 Core

Menace and Co.

Feb 11, 2010 · 10 min

Walter applies for work experience at Scrimp Towers, where Dennis' dad works. Dennis tries to help dad with the work and save his job from Walter after an accident.

S1·E38 Core

No Place Like Home

Feb 12, 2010 · 10 min

Dad gets promoted, which means his new job will involve his family moving to Drainotown, much to Dennis' disappointment, so he tries to change dad's mind and stay in Beanotown.

S1·E39 Core

Dennis Jumps the Line

Feb 13, 2010 · 10 min

Dennis plays a prank on the citizens of Beanotown, causing them to evacuate, which causes trouble for Dennis later.

S1·E40 Core

Operation Windbreaker

Feb 14, 2010 · 10 min

Dennis gets a new amplifier but doesn't have a chance to try it out because of Bea's demands and threats to let off a lethal fart if not done so he decides to hide the beans. Howev

S1·E41 Core

Menace on the Mend

Feb 15, 2010 · 10 min

To avoid getting into trouble, Dennis acts ill, leading him into a boring night in the hospital.

S1·E42 Core

Athena's Party

Feb 16, 2010 · 10 min

Dennis builds a BMX track near Athena's VIP party. However, Athena is standing for none of it.

S1·E43 Core

Dennis' Hiccups

Feb 17, 2010 · 10 min

Dennis gets a case of the hiccups from Mr. Har Har's can-o-giggles and is looking for a way to cure them ready for a film premier.

S1·E44 Core

Nanny State

Feb 18, 2010 · 10 min

Dennis' parents hire Nanny Moonbeam, a hippy who has an unusual and peaceful way of curing Dennis' bad behaviour. However, it gets on his nerves and eventually drives his parents u

S1·E45 Core

Mother's Day

Feb 19, 2010 · 10 min

Dennis tries to please mum by behaving for the whole day. But this isn't easy for him.

S1·E46 Core

Run Rabbit Run

Feb 20, 2010 · 10 min

Dennis and Gnasher are on a mission to find Walter's pet rabbit after Gnasher scares it away.

S1·E47 Core

Beanotown In Bloom

· 10 min

The garden is accidentaly wrecked when Dennis tries to give Gnasher a bath, so the gang have to fix the mess before Mum comes home.

S1·E48 Core

Fangs for the Memories

Feb 22, 2010 · 10 min

After hearing reports about a bat creature in Beanotown, Dennis highly suspects that The Colonel is a vampire.

S1·E49 Core

Curly's Collection

Feb 23, 2010 · 10 min

Curly doesn't attend band practice and Dennis finds out that this is because of a plan by Walter to sabotage the Dinmakers, involving a collectible series.

S1·E50 Core

Substitute Creecher

Feb 24, 2010 · 10 min

An accident happens at school and Mrs Creecher says that she will tell Dennis' parents about it at the school parent's evening. Dennis, Curly and Pie Face set up a scheme to stop t

S1·E51 Mytharc

Lost

Feb 25, 2010 · 10 min

Dennis, his friends and Walter's friends get marooned on a desert island when Dennis attempts to escape a boring field trip.

S1·E52 Mytharc

You're Joking

Feb 26, 2010 · 10 min

Dennis makes a line of practical jokes for Mr. Scrimp, called 'The Menace Collection.' However, Dennis soon learns that it will put Mr. Har Har out of business.

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