In an epic two-hour event, the weak, divided group gets a much-needed victory when the hunters score a kill. To finish the challenge, the survivalists must complete a brutal extraction across deadly killing fields of lions, crocodiles and leopards.

An attack by a venomous predator puts one of the survivalists at risk just three days into the challenge. With food scarce, the other competitors hunt warthogs and impalas but as they track their prey, the survivalists are also being stalked.

Jeff is called out for his "no hand-outs" survival strategy but refuses to back down. Through a free-wheeling discussion, new interviews, and never-before-seen footage, it's a new look into how the survivalists survived land, sea and each other.

The 10 remaining survivalists cross the 21-Day milestone and enter into unchartered waters. Scarce resources send the survivalists on a collision course. They fight for their lives with a huge electric eel and are visited in the night by a gigantic puma.

After nearly three weeks in the bush, two survivalists have tapped out and most others are making desperate treks across the savannah in search of food. If they can't find sustenance, they'll be forced out of the most difficult challenge of their lives.

To cross the gator-filled swamp, Rylie, Matt and Ryan engineer an epic 50-foot bridge in a desperate attempt for resources. Harassed by a black bear, Jeff and Steven must abandon their camp. EJ stalks a gator who has been stealing his fish.

After a week of being dropped into the dangerous and desolate badlands of Colombia with no food or water, one survivalist has already tapped out, another is on the brink, and hunger, thirst, and distrust are threatening to take down several more.

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.

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.

After fourteen days, many who remain are struggling to adapt to their environment and each other. Some consider migrating to try and find new resources, while in other camps tension continues to rise and may lead to our second tap out of the season.

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.

Far from extraction, Kaiela leads her team on a punishing trek that puts her challenge at risk.

12 of Naked and Afraid's best battle their biggest challenge yet - 60 days in Louisiana's punishing swamps.

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With a huge 8-foot alligator win, Gary eats parts that are too much for his team and his stomach.

Two survivalists confront sub-freezing temperatures in the swamp.

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Veteran survivalists are dropped into the badlands of Colombia, where they must survive for 40 days and nights with no food, water or clothes.

The final, and most difficult, part of the 40-day challenge begins. Jeff and EJ decide to attempt their extraction alone, and relationships grow contentious between both teams as they navigate the treacherous landscape to try and finish the challenge.

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.

Brutal heat punishes Suzanne as she makes a new start after leaving Seth. Barehanded Killer Bulent takes on a monitor lizard. A potential snake attack could be Seth's first African food win. A tribe plans a move that could upend the challenge.

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An eye-popping, reckless move puts a survivalist's challenge at risk.

Twelve elite survivalists venture to Montana's sub-zero conditions in the Rocky Mountains.

Facing an unprecedented two-day extraction, the final eight survivalists hunt, fish and trap potential food.