When British attempts at building a Hadron Collider go terribly wrong, the country is taken over by a herd of giant turtles.
As MPs flee in terror into the Ecuadorian Embassy, a Boy Band who last had a hit in the 1990s is asked by the general public to come to the rescue.
The key battle for survival takes place at picturesque Hadrians Wall where coincidentally all of our national treasures are performing in a charity concert.
There the offending animals are lured into a green washing machine the size of Scotland. The series ends with Bassey, Fry, John, Salmond etc abseiling down it singing "Back For Good".