Power-hungry tiny 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!
Series 1: 38. Bertie's Backbone
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 reb ...
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 ...