Two knock-out rounds to decide which two robots will battle against Dead Metal, Shunt & Sir Killalot in the arena at the end of the show. Competing robots: Paul Bunyan, Snake Bite, Night Stalker, Rosie the Riveter 2, Buzz, Ninjitsu, Snookums, Medusa Oblongotta.

Two knock-out rounds to decide which two robots will battle against Dead Metal, Shunt & Sir Killalot in the arena at the end of the show. Competing robots: Paul Bunyan, Snake Bite, Night Stalker, Rosie the Riveter 2, Buzz, Ninjitsu, Snookums, Medusa Oblongotta.

Robots from the USA and the UK battle each other in a straight knock-out competition to see which nation has the best robot. Competing robots: USA: Manta, Joker, Brawler, General Chompsalot 2 UK: Wowot, Tornado, Kat 3, Razer

Robots from the USA and the UK battle each other in a straight knock-out competition to see which nation has the best robot. Competing robots: USA: Manta, Joker, Brawler, General Chompsalot 2 UK: Wowot, Tornado, Kat 3, Razer

Sixteen robots are paired into teams to battle each other. Only one robot from each team is allowed in the arena at a time and the teams can switch robots by 'tagging' them. Competing teams: Trackzilla & Trilobyte, Mad Cow Bot & Texas Tornado, Sir Force A Lot & G-Force, Bang & Snookums, Rocky-Bot-Boa & Black Widow, Joker & The Falcon Mark 2, The Termite & General Chompsalot 2, Hyperactive & Mechadroid

Sixteen robots are paired into teams to battle each other. Only one robot from each team is allowed in the arena at a time and the teams can switch robots by 'tagging' them. Competing teams: Trackzilla & Trilobyte, Mad Cow Bot & Texas Tornado, Sir Force A Lot & G-Force, Bang & Snookums, Rocky-Bot-Boa & Black Widow, Joker & The Falcon Mark 2, The Termite & General Chompsalot 2, Hyperactive & Mechadroid

Six robots will enter the arena together and one robot would be knocked out in each round until there is one robot left standing. Competing robots: Brute, Cyclone, Hyperactive, Revenge, The Termite, Thor's Hammer.

Six robots will enter the arena together and one robot would be knocked out in each round until there is one robot left standing. Competing robots: Brute, Cyclone, Hyperactive, Revenge, The Termite, Thor's Hammer.

The winners from the previous heats compete for the US Robot Wars Championship

The winners from the previous heats compete for the US Robot Wars Championship

Competing robots: Buzz, Tyranabot, Xylon, The Falcon Mark 2, Bunny Attack, Paul Bunyan

Competing robots: Buzz, Tyranabot, Xylon, The Falcon Mark 2, Bunny Attack, Paul Bunyan

Competing robots: General Chompsalot 2, Marauder, G-Force, Run Away, Destructive Criticism, Lightning Tracks

Competing robots: General Chompsalot 2, Marauder, G-Force, Run Away, Destructive Criticism, Lightning Tracks

Competing robots: Tricerabot 3.0, Brawler, Diskotek, King of Diamonds, Dragbot, The Termite

Competing robots: Tricerabot 3.0, Brawler, Diskotek, King of Diamonds, Dragbot, The Termite