Laura Zerra

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.

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.

The group is devastated when two critical survivalists leave the challenge; with just 10 days left before extraction, Jeff is forced to change his survival strategy, but a medical emergency quickly has him on the brink of a tap out.

Twelve elite survivalists enter an unprecedented 40-day XL challenge; in the Philippines, the survivalists must survive shark-infested waters before facing a dense jungle crawling with deadly snakes and monitor lizards.