Dara O Briain and Angela Scanlon present a new format for the contest. Among the new twists are a new hazard that fills the arena with fog, Robot Redemption rounds, in which losing teams have a chance to get back into the contest, and the show's biggest ever battle, the Ten Robot Rumble, in which 10 teams battle to the death with no time limit. The teams this week are Donald Thump, Behemoth, Sabretooth, Apollo, Apocalypse and The Swarm. Along the way, they must dodge arena hazards, menacing house robots and the all new Fog of War. Let battle commence!