Forty teams of amateur robot fighting enthusiasts battle it out over a series of rounds in a huge purpose-built arena, aiming to become the Robot Wars Champion. It's not just the competition they have to contend with, as the arena is patrolled by four huge House Robots which are geared up to attack anyone who strays into their Corner Patrol Zones. There are also Fire, Spikes, The Flipper and The Pit, dangerous hazards designed to cause maximum damage to the competitors. In between their fights, teams have time to repair their robots and plan for their next fights in the pits area.

In this episode the most famous fighting robot in history, Razer, faces up against a host of other fighting robots for the chance to become the Robot Wars Champion. Eight teams made up of families and friends from across the country put their homemade robots to the test. The winner at the end of this show will go forward to the grand final.

In this show, we see the huge axe of Robot Thor driven by Jason, a builder from Northampton, clashing with father-and-son team Will and Ian from Team Shockwave. Judge Sethu Vijayakumar discusses his work with Nasa in creating androids for the mission to Mars.

This show features an eclectic collection of homemade robots including Glitterbomb, designed by nine-year-old April, which comes complete with a huge pink axe. In a Robot Wars first, a team of students from Falkirk, Scotland, bring a robot made of wood with a petrol engine and what appears to be an outboard motor for a weapon. Family team Big Nipper have an ingenious robot with interchangeable titanium weapons made up of parts they sourced from their local scrapyard.

This show features the former holiday camp bluecoats with their 'launcher' Apollo. Father-and-son team Kan-Opener have a robot with huge piercing claws. A team of engineering students have created a future-tech machine called Sweeney Todd that moves using mecanum motion to allow them to go in any direction around the arena, whilst PP3D has been built using a lot of 3D-printed parts.

This episode features the tallest robot - and also one of the most bizarre - ever seen on Robot Wars: Gabriel, built by Mensa member Craig and his three sons. It has wheels as tall as a washing machine and a huge samurai sword.

Other robots include Thermidor, shaped like a lobster by a team who have never eaten lobster; and Pulsar, built by 19-year-old self-taught engineer Ellis and featuring 9,000-RPM spinning teeth. There are dramatic scenes as one of the robots bursts into flames in the arena.

In this show, the heat winners from shows one to five are joined by a wild card from the runners-up. There are many shocks and surprises along the way as every team left standing battles it out to try and win, but who will become the Robot Wars champion?