Dara O Briain and Angela Scanlon's reboot of this popular series is proving a hit with fans and tonight they're back for another installment of robot action. Tonight there's even a robot designed by a nine-year-old, which comes complete with a huge pink axe. Other entrants include a team of students from Falkirk whose robot is made of wood and has a petrol engine, and a family team with an ingenious creation made up of parts sourced from their local scrapyard.