The eighteen celebrity recruits are transported by high speed rib to the new Hell Week base, an abandoned military base in east Cork. Waiting for them at the jetty are the course instructors (DS), who give them a short, sharp blast of what they can expect. The recruits, who for five days will have no contact with the outside world, are left in no doubt this will be an experience like no other.

The next phase of the course sees the recruits pushed to their absolute physical limits, with back-to-back events including boarding a large ship as it sails through Cork Harbour

Army training challenge in which civilian recruits are put through a gruelling special forces selection course

The challenge continues with a boat race across the busy shipping lanes of Cork harbour, before the recruits are paired off to box one another in two one-minute bouts

The recruits start the hardest test on the Hell Week course - Foreman Aftman - a timed mountain march with over 50kg of kit of their backs

The programme reaches its final phase. Of the 18 recruits who started, only four candidates now remain, and the courses culminate in one final event