Astronaut Chris Hadfield, former Nasa medical researcher Dr Kevin Fong and psychologist Dr Iya Whiteley put 12 exceptional candidates through a series of gruelling physical and psychological tests to find out who has what it takes to be an astronaut. Using the demanding criteria of space agencies, they must hover a helicopter, take their own blood and be tested for claustrophobia, physical fitness and mental agility. Those who fail to make the grade can be asked to leave at any time.

Originally released by BBC Worldwide Learning, 2017. Streaming video file encoded with permission for digital streaming by Infobase on November 21, 2019.