The remaining astronaut candidates are put through more demanding tests by astronaut Chris Hadfield and his expert panel. Some are pushed to their limits in a simulated emergency splashdown, where they have to escape from an underwater capsule. At the UK's biggest space-tech firm, they must successfully operate a ground-breaking robot, the Mars Rover. A social event gives Chris and the panel a further chance to scrutinise their character. Not all candidates make it through this phase of selection.

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