Series 1

01 The Way of Den-Do Episode 17th September 2009 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. 02 Smelling of Roses Episode 28th September 2009 Inspired by the mayor's call to make Beanotown Green-o-town, Dennis tries renewable fuel sources to launch his space mission. 03 Curtains for Dennis Episode 39th September 2009 Dennis uses curtains as a giant sail, not knowing its specially for the kitchen and loses it to the Colonel. 04 Splash! Episode 410th September 2009 In attempt to keep cool on a hot day, Dennis' gang dig their own pool in Dennis's backyard. 05 The Mystery of the Missing Teapot Episode 511th September 2009 Dennis comes across a bundle of objects that inspire him to be a private investigator and begins searching for Gran's lost teapot. 06 Castle in the Air Episode 614th September 2009 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. 07 Aliens Among Us Episode 715th September 2009 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. 08 No Joke Episode 816th September 2009 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. 09 Dennis V.I.P Episode 917th September 2009 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. 10 Bad Dad Episode 1018th September 2009 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. 11 Gnasher in Nappies Episode 1121st September 2009 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. 12 Rubberbands and Paperclips Episode 1222nd September 2009 Dennis tries to help Dad get a raise, but Dad ends up fired, so Dennis makes Scrimp's office seem incapable without Dad. 13 Boot Episode 1323rd September 2009 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. 14 Breakout Episode 1424th September 2009 Dennis hatches a plan to bail Gnipper imprisoned in Beanotown dog pound, by impersonating a misbehaving dog. 15 Eyes on the Prize Episode 1525th September 2009 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. 16 Dance of the Seven Pies Episode 1626th September 2009 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. 17 The Pond Monster Episode 1727th September 2009 In an attempt to reclaim the park, Dennis and friends try to scare everyone with a 'pond monster.' 18 Dennis' Thank-you's Episode 1828th September 2009 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. 19 Fish Tale Episode 1929th September 2009 Dennis and friends have a go at catching the Legendary Beanotown Pike, but when Walter hears about it, the game is on. 20 Masters of the House Episode 2030th September 2009 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. 21 Game On Episode 211st October 2009 To get his friends back from Walter's group, Dennis challenges Walter to a videogames battle. 22 All-in Menacing Episode 222nd October 2009 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. 23 Attack of the Walterbot Episode 233rd October 2009 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. 24 Great Outdoors Episode 244th October 2009 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. 25 No Pies for Pie Face Episode 255th October 2009 Dennis and Co. have to control Pie Face's obsession with pies during the Pie Festival. Otherwise, they will be grounded. 26 Dog Tired Episode 266th October 2009 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? 27 Dig This Episode 271st February 2010 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? 28 The In Crowd Episode 282nd February 2010 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! 29 First Aid Dennis Episode 293rd February 2010 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. 30 Rock And A Hard Place Episode 304th February 2010 Dennis is made to attend a Neighbourhood Watch meeting by his parents. This, however clashes with a jam session with Curly and Pie Face. 31 Horsey Havoc Episode 315th February 2010 Dennis breaks Bea's toy horse, so Dennis is searching for a new one to cheer her up. 32 Grounded Episode 326th February 2010 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. 33 Double Act Episode 337th February 2010 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's true capabilities. 34 The Curse of Madam Gigi Episode 348th February 2010 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." 35 Random Access Mayhem Episode 359th February 2010 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. 36 Treehouse Treason Episode 3610th February 2010 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 about it! 37 Menace and Co. Episode 3711th February 2010 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. 38 No Place Like Home Episode 3812th February 2010 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. 39 Dennis Jumps the Line Episode 3913th February 2010 Dennis plays a prank on the citizens of Beanotown, causing them to evacuate, which causes trouble for Dennis later. 40 Operation Windbreaker Episode 4014th February 2010 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. However, Bea retaliates by stealing the volume knob off the amplifier. 41 Menace on the Mend Episode 4115th February 2010 To avoid getting into trouble, Dennis acts ill, leading him into a boring night in the hospital. 42 Athena's Party Episode 4216th February 2010 Dennis builds a BMX track near Athena's VIP party. However, Athena is standing for none of it. 43 Dennis' Hiccups Episode 4317th February 2010 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. 44 Nanny State Episode 4418th February 2010 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 up the wall. 45 Mother's Day Episode 4519th February 2010 Dennis tries to please mum by behaving for the whole day. But this isn't easy for him. 46 Run Rabbit Run Episode 4620th February 2010 Dennis and Gnasher are on a mission to find Walter's pet rabbit after Gnasher scares it away. 47 Fangs for the Memories Episode 4822nd February 2010 After hearing reports about a bat creature in Beanotown, Dennis highly suspects that The Colonel is a vampire. 48 Curly's Collection Episode 4923rd February 2010 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. 49 Substitute Creecher Episode 5024th February 2010 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 this from happening. 50 Lost Episode 5125th February 2010 Dennis, his friends and Walter's friends get marooned on a desert island when Dennis attempts to escape a boring field trip. 51 You're Joking Episode 5226th February 2010 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.