Following an injury, Oli is on his second attempt to join the ranks of the Mountain Leaders, an elite unit within the corps. Although passing is tough, Oli hopes that this year he’ll make it.

Change comes to this centuries-old corps. Donna dreams of becoming one of only three women in the commando ranks, while Callam juggles work and home life.

In pursuit of drug smugglers in the Persian Gulf and sub-zero temperatures of the Arctic for survival training.

We go behind the scenes of one of the most elite military organisations in the world, following young recruits Dom and Kane as they attempt to earn the prestigious green beret. They have both completed a gruelling seven months of training, but can they join the one per cent of original applicants who go all the way, earning the right to call themselves commandos?