Wes Nelson

Twelve celebrities head out for the wilds of the Scottish Hebrides for a series of full-on challenges in a gruelling version of the SAS selection, including an aerial assault course.

Jimmy Carr hosts as Rob Beckett and Tom Allen are joined by Scarlett Moffatt, Harriet Kemsley, Wes Nelson and Rosie Jones to compete in the comedy panel show.

The 12 celebrities take on hand-to-hand combat, then put their wits to the test in a hostage rescue mission. With tension mounting, two of the recruits are soon heading home.

The celebs do pair work as they descend 100 feet down a rock face, force march and carry a 40kg fuel drum over rough terrain. By the end of all this, some will be heading home.

Only five celeb recruits remain, and they're about to be sent on the run on an escape and evasion mission. To break them down physically and mentally before this final stage, the Directing Staff (DS) push the recruits hard with two gruelling tasks.

The last five recruits are on the run from a specialist hunter force who are trying to track and capture them. If captured, the recruits will face the most psychologically demanding of all the phases, interrogation.