In the penultimate episode of the series, Expulsion, Coyote, Thor, Magnetar, Hobgoblin and Push to Exit all fight for a place in the Robot Wars Grand Final.Georgina and her classmates from Expulsion hope to win, despite their youthful inexperience.Magnetar and self-taught engineer Ellis are looking to prove the doubters wrong by finally building a reliable machine, and Crufts fan Shane, with his robot Push To Exit, hopes to be best in show. Dara Ó Briain and Angela Scanlon present the action, and as always the battles are overseen by the judges Professor Noel Sharkey, Professor Sethu Vijayakumar and Dr Lucy Rogers, from the Robot Wars arena in Glasgow, with commentary by the legendary Jonathan Pearce.