Special Forces: World's Toughest Test

The recruits sidestep above a 200ft high canyon floor, then compete in one of the most physically brutal tasks of the season.

The recruits descend using control and navigate through tight tunnels.

The recruits work together to save lives and survive extraction.

The recruits escape a sinking plane and fight against each other in a boxing match.

Eighteen new celebrity recruits are immediately pushed outside their comfort zones.