Attempting to prove his theory that what the world always needs is a hero, Danger Mouse fights off what appears to be an alien invasion of Earth but his inflated ego soon becomes the real intergalactic threat! The alien invaders are tourists led by Quark and DM's impressive performance in sending one tour packing, soon leads to millions more arriving. Danger Mouse becomes the most popular tourist attraction in the universe. Visitors flock to earth turning it into a massive Danger Mouse inspired theme park. It's up to Penfold to save the world by convincing Danger Mouse that what the world needs right now is a... coward!?

Colonel K's comments while opening the Danger Museum rile his old nemesis into breaking out of Arkwright Asylum. Brigadier Burt Badboy robs the museum and gets hold of his old weapons. He'll make the Colonel pay for his rude comments! The Colonel tries to deal with the villain personally but only makes the problem worse and has a crisis of confidence as the Brigadier uses his rudeboy bullhorn to spread anti-social behaviour. With DM and Penfold paralysed by rudeness the Colonel knows the world needs him to dust off his old battle blazer and take on his ancient nemesis one last time.