The six remaining famous faces undergo the final stage of this intense version of SAS selection in the Inner Hebrides under the guidance of chief instructor Ant Middleton and his team of Foxy, Billy, Ollie and Jay. Over the course of 48 hours, the celebrity recruits take on the interrogation phase, a torturous exercise where the interrogators keep ramping up the punishments, with the recruits being put through horrendous torture techniques. Only the physically and mentally elite make it to the end and pass the course.