Contestants from Worcester, London, Rotherham, Rochester and Kent take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final.

Contestants from Birmingham, Blackburn, London, Manchester and Croydon take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final. Only the winning team play the last round, Divide and Conquer. And in a twist, team mates turn against each other as only one player can win the episode.