How do you design a space settlement government without it descending into tyranny? Charles Cockell from the University of Edinburgh shares his research with hosts Sue Nelson and Richard Hollingham. As the UK prepares for its first rocket launch in 50 years, we talk to Matt Archer from the UK Space Agency about the UK’s launch plans and ambitions. And Richard heads to Goonhilly Earth Station in Cornwall to hear how a dish that brought the world Live Aid is now communicating with Mars. Plus we tackle the fundamental question - are there alien taxi drivers?