Mr Strong has become a superhero with his own secret hideout and gadgets galore, but what every good superhero needs is a sidekick. So Mr Strong asks his friends if they'd like to try out. But he soon realises that choosing a sidekick is hard work. Which Mr Men or Little Miss will have what it takes to make the perfect superhero sidekick?

The Mr Men and Little Miss Adventures take Roger Hargreaves' beloved characters on amazing trips to other worlds and different times where they have all kinds of funny and exciting escapades.