The last six recruits face deep interrogation and a day of sickeners, including `drownproofing' - simulated drowning. Only the physically and mentally elite will make it through.

The recruits are stalked across the Scottish Highlands by a military-trained hunter force, before facing extreme interrogation on limited sleep and rations. Who will crack?

The recruits are pushed to control their aggression, as they're trained with guns and take part in hand-to-hand combat, in an episode exploring loss, loyalty and self-control.

The recruits' grit is tested as Jay's undercover status is revealed and he launches a brutal beasting to expose the weakest in the group.

The recruits take on the intense close-combat murderball and surf immersion - a notorious water beasting that simulates water torture.

Led by Ant Middleton, 25 men and women - including an ex-SAS operator working as a mole - face the latest intense course, beginning with a swim to a remote Scottish island.