The Ministry of Defence has said it will never allow Selection to be filmed. But in this series a group of ex-Special Forces personnel take 30 ordinary men through grueling physical and mental tests from real Special Forces entry programmes. To join the elite ranks of the SAS, physical fitness is a minimum. The true test is one of character. Spending eight days isolated from the outside world the recruits are subjected to psychological profiling, sleep deprivation, stress positions, extreme endurance and interrogation. Who has the grit to complete this most demanding military selection process?