Upphovsland: Storbritannien
1. Avsnitt 1
Avsnitt 1, Säsong 1
The astronaut candidates must hover a helicopter, take their own blood and be tested for claustrophobia in the first round of tests.
2. Avsnitt 2
Avsnitt 2, Säsong 1
The remaining astronaut candidates face a simulated emergency splashdown where they have to escape from an underwater capsule.
3. Avsnitt 3
Avsnitt 3, Säsong 1
The remaining astronaut candidates face more gruelling tests, including assembling a large cube underwater, learning basic Russian and attempting to dock the Soyuz Space capsule with the International Space Station.
4. Avsnitt 4
Avsnitt 4, Säsong 1
The remaining candidates head off to a secret facility in Sweden where they are deliberately deprived of oxygen to see if they can recognise the signs of hypoxia.
5. Avsnitt 5
Avsnitt 5, Säsong 1
The candidates' leadership skills are tested in a terrifying cliff abseil and a gruelling survival test, but weaknesses are exposed in the group. Those who succeed are sent to Florida to carry out a spacewalk dive in an underwater marine lab.
6. Avsnitt 6
Avsnitt 6, Säsong 1
The finalists dive down to the Aquarius underwater research laboratory in the Florida keys, a training facility used by NASA. They return to London's Science Museum to find out who has won the competition and has what it takes to be an astronaut.
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