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 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.