SAS: Who Dares Wins

The recruits must write essays about themselves, before an eight-mile combat fitness test.

The remaining recruits face a seemingly endless series of physical challenges.

The directing staff test the remaining recruits' resistance to fear.

The final recruits face a punishing 72-hour cat-and-mouse chase across challenging terrain.

The remaining recruits each face the final, notoriously gruelling stage of selection alone: 24 hours of interrogation.