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Series 1: 9. The Hamazing Hamsterman
Dennis gets into a fluffy mess when he runs into Von Screwtop's hadron collider with the professor's pet hamster, Galahad. To stop Dennis from completely changing into a hamster, the gang must sneak him into Wilbur's lab to use his reverse hadron collider and change him back!
Source: CBBC
Most recent episodes of Dennis & Gnasher Unleashed!
Dennis & Gnasher Unleashed!
Series 1: 20. Why So Clonely
Dennis accidentally clones himself and uses his exact opposite clone to do all his chores and abide by the rules at school. All is going to plan until Walter realises what has h ...
01-03-2026
CBBC
Dennis & Gnasher Unleashed!
Series 1: 19. The Great Beanotown Bake-off
Pieface's all time hero, Cherry Bakewell, is coming to Beanotown to judge the annual bake-off. Pieface wants to make the best pie ever and win the competition, but when Dennis d ...
28-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 43. Failing To Register
Determined to prove he can accomplish a task without getting distracted, Dennis takes on the simple job of bringing the class register to the school office. He instantly distrac ...
27-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 5. Blamjitsu Sensei
Convinced that Mrs Creecher is secretly a master of Blamjitsu, JJ persuades the gang to help trick her into revealing her blam credentials.
27-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 42. Dozing Dennis
Dennis was up most of the night and can barely stay awake. Gnasher and the gang work hard to help steer dozing Dennis through the day, when all he wants to do is continue to dre ...
26-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 4. Pranksy
The after-school art club is under threat of imminent demolition. In trying to save the club, the gang end up on the trail of the mysterious undercover urban artist known only a ...
26-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 41. Monitors
A classmate who Dennis and Walter barely know gets appointed as Class 3C’s late monitor, making it urgent that the boys find a way to pal up with him, whatever it takes.
25-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 3. Bathmageddon
It’s time for Gnasher’s annual bath, but the stinky hound will do anything to avoid the tub. Dennis and Gnasher go head to head in a town-wide game of cat and mouse ...
25-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 40. Gnasher Dash
Gnasher is practically immobile inside a full-body cast. When he goes missing, Dennis and the gang race all over Beanotown to find him, always one step behind the helpless hound.
24-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 2. The P Factor
Pieface is secretly doing underpants laundry chores for Walter, hoping to help Dennis save up some cash. He urges the gang to audition for a replacement Pieface to make up for h ...
24-02-2026
CBBC
Most popular episodes of Dennis & Gnasher Unleashed!
Dennis & Gnasher Unleashed!
Series 1: 10. Prank Wars
Dennis discovers that Ralf the janitor is the legendary Prankmaster General and is told he could become his successor. Walter won't let this happen and challenges him to a prank ...
25-01-2026
CBBC
Dennis & Gnasher Unleashed!
Series 1: 25. Postcards From The Veg
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 the gan ...
27-09-2025
CBBC
Dennis & Gnasher Unleashed!
Series 1: 51. Dennis And The Beanostalk
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 Ga ...
25-12-2025
CBBC
Dennis & Gnasher Unleashed!
Series 1: 34. Extreme Sports Day
Dennis recruits Grizzly Griller to help make school sports day more extreme, but as he and JJ get competitive against each other, who is sabotaging both their chances of winning?
26-10-2025
CBBC
Dennis & Gnasher Unleashed!
Series 1: 11. Give Peas A Chance
Mayor 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 ...
31-01-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 18. Inventor's Block
Dennis doesn’t realise that the pressure he’s putting on Rubi to excel in the school science fair is giving her a severe case of inventor’s block.
26-01-2026
CBBC
Dennis & Gnasher Unleashed!
Series 1: 16. Wonder Sausage
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 perform his every ...
15-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 1: 3. Dinmaker Diva
Dennis and the gang are fed up with dinner lady Olive's completely inedible school dinners. In their mission to 'drop the slop', they discover a poster of her past career as a s ...
03-01-2026
CBBC
Dennis & Gnasher Unleashed!
Series 1: 15. Super Paul
After Dennis persuades Pieface that Paul is an undercover super hero, Gnasher, JJ and Rubi go along with the story and help Dennis to 'prove it'.
14-02-2026
CBBC
Dennis & Gnasher Unleashed!
Series 2: 2. The P Factor
Pieface is secretly doing underpants laundry chores for Walter, hoping to help Dennis save up some cash. He urges the gang to audition for a replacement Pieface to make up for h ...
24-02-2026
CBBC