Astronauts: Do You Have What It Takes?

Chris Hadfield, Dr Kevin Fong and Dr Iya Whiteley put 12 candidates through a series of physical and psychological tests to find out who has what it takes to be an astronaut.

Old fears surface when the remaining candidates face some space agency swim tests. Their teamwork and mental agility are scrutinised in an underwater test, assembling a large cube.

The finalists head to the Shuttle Landing Facility on Floridas Space Coast for a tough test in weightlessness, and back in London the winner is decided.