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.
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.
