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.