PREVIEW: SAS Who Dares Wins (Episode 3), Channel 4

The recruits are now in the third phase of the condensed version of the SAS selection programme.

The next 48 hours are all about how they control their emotions, as they are set to be tested in three brutal tasks.

In a series first, the recruits are expected to perform a backwards dive at night; to also perform an illusion jump; and then to summon up but also control their aggression as they take on 'the Redman'. And after all this, and to the utter shock of all the recruits, the undercover DS is revealed.

SAS Who Dares Wins continues Sunday at 9pm on Channel 4.