The remaining recruits are hurled into a terrifying escape drill with a single ladder suspended 15 metres up, which must be crossed while under enemy fire. As the heat intensifies, they must trek through a scorching canyon before embarking on an extreme ammo resupply. And the punishing race to a mountain summit with 100kg of kit exposes one recruit's leadership shortcomings.

A failed rescue mission, a brutal task and rising pressure test group bonds as armbands are stripped and emotions laid bare.