Celebrity SAS: Who Dares Wins for Stand Up to Cancer

Sixteen new celebrities, including Gareth Gates, Matt Hancock and Gareth Thomas, undergo special forces training in the Vietnamese jungle. Trainers Billy, Foxy, Rudy and Chris put the contestants to the test as they face the world's most challenging selection course - the trainasium, before fighting against each other in the rawest form of combat. Once celeb learns the importance of being a part of a good team as his failures result in others being punished.

Famous faces including Gareth Gates, Matt Hancock and Gareth Thomas undergo special forces training. The celebrities face a punishing search operation through a series of rooms filled with CS gas. Can they work together to locate and escape before being overcome by the brutal effects of the contaminated air? Their mindset is also tested under pressure during a rescue mission when they are tasked with extracting two fellow recruits who have been taken hostage.

The celebrities are tested on their mental and physical resilience, including an ascent to the top of a 200-foot cave, where they're ordered to abseil back down again. The second task is murderball: a serious test of physical strength and aggression. Finally, the recruits are tested emotionally when they must write a death letter to their loved ones.

The trainees must prove they can trust their team, their leaders and themselves in a challenge so gruelling it leads to the medical withdrawal of three incapacitated recruits. For the second task of this phase, the celebrities are put through an individual challenge in which both their physicality and trustworthiness are put to the test.

One by one, the recruits must pull themselves across a 300-foot-wide ravine, before dropping 160 feet to the extraction point. An early-hours beasting is designed to weed out the weakest recruits. The recruits must also prove to the supervisors that they have what it takes mentally when they're offered a phone call to their loved ones back home.

The remaining recruits face a rough bout of pontoon wrestling. The hardships of jungle life take their toll, including draining weather, a lack of sleep and a calorie deficit from limited ration packs. This leaves the celebrities in far from their best condition as they embark on a simulated mission behind enemy lines.

For their final challenge, the five remaining celebrities endure intense interrogation, the most feared phase of the course. They must go through psychological and physical punishments designed to break their will and force a confession.