12 elite survivalists enter an unprecedented 40-day XL challenge. In the ocean off the coast of the Philippines, they must survive a shark-infested ocean and then face the dense Philippine jungle crawling with deadly snakes and monitor lizards.

12 elite survivalists are dropped into the brutal South China Sea where they must survive 40 days on land and sea. Plus, 2 All-Star survivalists enter the same challenge looking to survive not just 40 but an unprecedented 60 days.

With resources dwindling, the survivalists venture into the shark-infested waters of the South China Sea searching for a much-needed meal.

Ambushed by tropical storms, the survivalists are pounded by torrential rain and heavy surf; survivalists are stalked by sharks after taking to the open seas; one survivalist reaches his or her breaking point due to the storms and lack of food.

Since the open sea is too dangerous to navigate, survivalists trek through a jungle filled with venomous centipedes, vipers and monitor lizards.

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 puts him on the verge of a tap out.

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.

Season finale. Medics closely monitor Jeff's high fever and prepare his evacuation. The others scramble for a 5-mile extraction journey through shark-infested waters. A survivalist pushes too hard leading to a medical emergency on the open sea.