The final four trekkers reach an impassable chasm at the peak of their journey; the eliminated members return for a pivotal role.
The group faces a daunting chasm known as King's Leap, which they must cross by pulling themselves to the other side using a single rope.
As the trekkers hit the halfway mark, a divide in pace emerges within the group; the group learns that they have broken a fundamental rule.
Sixteen strangers embark on a journey through the treacherous New Zealand Alps; a medical emergency occurs just hours into the trek.
The final seven confront a new phase, an icy glacier, the Mountain's Keeper arrives with the necessary gear but it comes at a cost.
