Sir Tony Robinson travels the world to explore the most unusual and innovative machines and vehicles. In each episode, Tony discovers four truly mind-blowing and unique machines.Tony will meet the teams who operate them and the amazing engineers, scientists and inventors who created them. Through behind-the-scenes access to the factories and workshops, technical displays and engaging challenges, he'll explore the incredible science and engineering that make these machines tick in fun and exciting ways... and sometimes even get to have a go at operating them himself.