A behind-the-scenes look is taken at the training and work astronauts undertake as the former ISS commander Chris Hadfield, a doctor and a psychologist assess 12 astronaut candidates to see if they have what it takes to survive space.

A behind-the-scenes look is taken at the training and work astronauts undertake as the former ISS commander Chris Hadfield, a doctor and a psychologist assess 12 astronaut candidates to see if they have what it takes to survive space.