Over the course of 11 days, the recruits will face tough physical tasks on land and the sea surrounding the island.
The new series returns to the roots of the Special Forces as the Directing Staff strip the selection right back, making it rawer and tougher than ever.
The recruits will face harsher conditions, stricter food rationing and very little sleep as their survival instincts are put to the test.
Who will be the first to voluntary withdraw from the selection process?
SAS: Who Dares Win begins tonight on Channel 4 at 9pm.