Celebrities who think they have what it takes to pass the SAS selection are pushed to their limit by an elite team of ex-special forces operators. Fifteen recruits from the worlds of entertainment, sport and journalism take part in the hardest course yet, as Chief Instructor Billy and his team expose them to winter warfare training on New Zealand's South Island. For their first task, the celebs must traverse the Trainasium - parallel metal bars suspended 335ft in the air. Then, the recruits' mindsets are tested under extreme pressure when they stage an intense hostage rescue mission.

The spotlight focuses on the Special Forces' high levels of discipline. In the first task, a terrifying feat tests the celebrities both mentally and physically as they race in a forward abseil down a 300-ft working dam. Then, under cover of darkness, the recruits must perform one of the most feared tasks - the backwards dive. Will the celebrity recruits conduct themselves in the manner required?

The celebs are paired with an 'oppo' for support. But then they have to fight each other.

The recruits face an escape from a simulated helicopter crash in near freezing water.

The recruits must protect a VIP on a journey through the wilderness.

It's time for some true grit, an ambush, dead-of-night escape and mud wrestling

The celebs are ambushed as they battle to complete the course.