 OK, best to get on with the show. So who is on the podium, Ed? Our guest today is a Paralympic medalist in the 100 metres. He won bronze for Great Britain at the 2008 Games in Beijing. And from that moment, he's never stopped reaching for the stars. But unlike most of us, he might actually get there. An orthopaedic surgeon, he is part of the European Space Agency's astronaut plan. John McFall, welcome to On the Podium.