The recruits find themselves back in the water in physically challenging tests. The group forms a deep emotional bond with one another and one recruit has a shocking exit.
Sixteen household names arrive in the desert to endure some of the hardest and most grueling challenges from the book of actual special forces soldiers.
The recruits are taken to the top of a mountain range to face the most demanding exercise of selection using a single rope to commando cliff crawl across a deadly ravine.
A troop of fourteen faces some of the harshest challenges. They must face the reality of winter warfare training in the mountains of New Zealand's South Island where the terrain and freezing temperature are brutal.