After surviving the first four brutal training courses, the ten remaining recruits are about to enter a more psychologically challenging phase - the world of the Russian Spetznaz Special Forces, under the authority of veteran Sonny. With only six places available in next week's grand final, the recruits will have to draw on every ounce of their depleted reserves to make it through 48 hours of rigorous mental and physical testing.

From carrying heavy weights for miles through the gruelling hills of south Wales to having their wits tested under extreme mental endurance, the recruits will be marked down for the smallest mistake and any weakness shown could mean not making it to the final. Who will be in the final six?