Brian and Sophie crash-land by the sea and find four more children to foster – however their memories of the past seven years are wiped by Guido, the new avatar for the Galactic Guidebook, and are now unsure of how the new members of the family will react to the news of their alien identity.

Brian embarks on a miniature crime spree, ordering Eddie to steal all of the cakes he can get his hands on. Meanwhile, Sophie tries to become the perfect mother. Sophie bakes the best cake in the world for Dan. Brian wants it – and tries to persuade Eddie to help him steal the big creamy pile by murdering Sophie.

Brian tries to make Dan a hero by staging a series of fires in the school toilets, while Sophie manages to fill the house up with piles of rubbish.