Gabrielle Balassone

Medics closely monitor Jeff's high fever and prepare for his evacuation; the others scramble for a five-mile extraction journey through shark-infested waters; a survivalist pushes too hard leading to a medical emergency on the open sea.

Steven takes a huge risk when he raids a caiman nest for eggs; Dan and Waz join forces to snare the vultures circling their camp; Amber, Trish and Jen take on a huge project, but tensions could tear them apart.

Scrambling from the start, 12 elite survivalists take on their harshest location yet, the sub-freezing Rocky Mountains of Montana.

Jeff is called out for his no hand-outs survival strategy but refuses to back down; a look at the survivalists and how they survived each other, featuring a freewheeling discussion, interviews and never-before-seen footage.

A survivalist on a hunting expedition is bitten by a snake and requires an emergency medical evacuation; tensions arise between teams as hunting grounds get territorial; one group scores protein while their neighbors are on the brink of starvation.

A grueling five-mile hike into the snake-filled jungles of the Palawan island tests the three remaining teams of survivalists; the one-day journey turns into two days of chaos, and one survivalist must be medically evacuated from the challenge.