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!

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Six more robots compete in the second heat, with last year's champion Carbide returning to face brand new challengers Eruption, Aftershock, Crackers N Smash, Gabriel 2 and Big Nipper. Dara Ó Briain and Angela Scanlon present the show, with commentary from Jonathan Pearce.

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Dara Ó Briain and Angela Scanlon present the third round, with robots Apex, Vulture, Terrorhurtz, Track-Tion, Bucky the Robot and Rapid battling it out. Among the contestants controlling the machines are a group of schoolchildren who are this series' youngest entrants and a team that has spent more money on their robot than any of their rivals.

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Six more teams compete in the fourth heat, as robots Iron-Awe 6, the Kegs, Tauron, Nuts 2, Concussion and Androne 4000 battle through a series of group battles and knock-out rounds. Among the contestants controlling the machines is a veteran of the series, returning to defend his legacy. Presented by Dara O Briain and Angela Scanlon.

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This penultimate episode determines which of the incredible fighting machines makes it into the grand final, along with the final two robots to compete in the Ten Robot Rumble. The competition in the final heat is fierce with Thor, Coyote, Expulsion, Hobgoblin, Push to Exit and Magnetar all battling it out in the bulletproof arena. Along the way, they must dodge arena hazards, menacing house robots and the all new Fog of War.

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The illustrious grand final begins with the biggest battle in Robot Wars history. The second- and third-place robots from the heats battle it out in a ten-way, no time limit, last-robot-standing fight to the death to determine the sixth robot in the final. Once the carnage of the Robot Rumble is over, there are two brutal group battles followed by the nightmarish knockout rounds in order to determine the two robots that will fight it out to decide who the Robot Wars champion is.

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