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.
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 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.