The remaining celebrity recruits face a final, brutal challenge at the El Morado glacier, 3000 metres above sea level.

The recruits are pursued through the Chilean countryside by a military hunter force. One recruit cracks and a bad decision jeopardises another's place on the course.

The celebrities are paired up to prove that they're team players, and must put their lives in each other's hands, in a terrifying free fall abseil.

One recruit collapses on a mountain and another is badly affected by the extreme cold, as Ant and the directing staff put the celebrities through a series of brutal challenges.

The celebrity recruits must dive backwards out of a helicopter before facing their fears in two-versus-one boxing. One recruit faces demons from her past and another struggles with a defiant attitude.