Many of us dream of going into space, but for one of the 12 aspiring astronauts taking part in this fascinating series, fantasy could become a reality.

Candidates carry out gruelling training under the eye of Chris Hadfield, former Commander of the International Space Station, who will recommend the best one to recruiting space agencies.

The first task is to fly a helicopter, but it’s the seemingly simpler tests, like recalling numbers backwards, that truly reveal their strengths and weaknesses.