First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two Northern Ireland
22 of Britain's toughest civilians face a fortnight of hell. The recruits are ambushed by a former colonel in the South African Special Forces Brigade. Show more
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two HD
The recruits meet their next special forces expert - Rafal Nowakowski, a former lieutenant of Polish GROM. Rafal starts with a basic fitness test and isn't impressed. Show more
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two HD
The remaining recruits face some of the toughest physical challenges yet under the eyes of former Master Sergeant Terry Schappert of the US Army's Green Berets. Show more
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two HD
The recruits meet Ken, a lieutenant in the Republic of Korea's Underwater Demolition Team. His unconventional methods push everyone out of their comfort zone. Show more
First broadcast: on BBC Two EnglandLatest broadcast: on BBC Two HD
The remaining recruits face two former members of the GIGN, an elite tactical unit of the French police, who will test their abilities to operate under pressure. Show more
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two HD
After ten days of blood, sweat and tears, the last recruits face the final Special Forces veteran, a former member of the Australian Special Air Service Regiment. Show more