With the day 60 extraction looming, a hunt goes awry and leads to an all-out jungle search for wounded prey; the team's large-scale raft build could be a crushing waste of time and calories; a survivalist decides this will be their last challenge.

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

With extraction just days away, one survivalist goes against the group, is banished and must try to complete the challenge alone.

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.

Wes and team get their third big-game kill, but the victory quickly becomes an unexpected and very dangerous medical situation. A broiling heat wave pushes temperatures to 130 degrees and tests Bulent's ability to survive solo.

The Legends put their mark on the challenge; desperate to get food for Steven, EJ creates poison blow darts to chase a much-needed meal; Matt spearheads an ambitious dock build that drains Dan's strength; Jeff adds to the tension on Amber's team.

All 12 survivalists return to bring viewers behind-the-scenes of their epic 40-day challenge in South Africa

With Amber gone, Trish and Jen must fend for themselves; Amber joins forces with Steven and EJ. A distant fishing hole means a punishing journey for their next meal; after a huge food win, Dan and Waz make a high-risk choice.

Wes scores another kill, but when a group enters their camp, the win creates tension. A desperate Bulent migrates to Seth's watering hole. Seth is open to a partnership but Bulent remains solo and quickly gets a major food win in Seth's backyard.

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

Desperate for food ahead of their Day 40 extraction, Jen pushes Trish to hunt new territory. Dan, Waz and Matt corner one of the Amazon's apex predators, a six-foot caiman. When Trish and Amber's paths cross again, tensions re-surface.

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

Pushing past day 50, the final six survivalists come together as one group, but must scramble to expand their shelter; the Amazon unleashes a bee swarm and a torrential storm; a knife accident threatens a survivalist's challenge.

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.

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.

An unlikely alliance scores the challenge's first big-game kill. Suzänne risks her survival by banishing herself from Seth. Bulent wards off hyenas and baboons. On a two-day hunting mission, Ryan's surrounded by deadly predators.

With 15 days to go in the 40-day challenge, the ten remaining survivalists - dehydrated and protein starved - find themselves converging at dangerous Piranha Lake where they will they compete over scarce food and water.

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.

The Peruvian Amazon. A rich, beautiful rainforest where thousands of species of animals and plants want to kill you. Now, 12 survivalists begin a new XL challenge there -- some going for 40-days, others attempting 60-day legend status.

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.

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

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 brutal windstorm punishes the survivalists. A falling out with Bulent leads Makani to banish herself and risk going it alone. Kate finds a new group and the desperate team goes on a hunt that could make or break their challenge.

Two survivalists confront sub-freezing temperatures in the swamp.

Desperate for food, Gwen and Sarah lead the charge to build a crossbow in the bush while Ryan feels the pressure to provide.

Lacey's night-fishing plan yields a boost in strength and team morale. Lack of food and sleep at Camp Laguna Negra makes Shannon spiral downward. Matt and Russell take to the water and score another huge protein win.

12 survivalists take on a 40-day XL challenge in the ferocious, heat-stricken, deadly South African bush, a location so challenging ancient tribes would banish the weak. Now, these survivalists will do the same if someone isn’t pulling their weight.

The "dirty dozen" survivors from Naked and Afraid XL come together for the first time since their life-changing 40 day challenge. They'll discuss good times, hard times, and try to heal unresolved issues.

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

A massive food win buoys Terra and their whole team. On the heels of a caiman kill, Malorie sets her sights on a bigger prize. Heather is shocked when Adam tells her he has not been sharing food. A scorching migration could end Heather's 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.

Adam, Heather and Sam score a protein win, but the trek through Colombia's badlands puts the team at risk; Chris battles a mystery illness; Nathan reveals a secret to his partners; the Proving Grounds send a survivalist home.

The remaining survivalists join forces; when the group splinters to hunt resources, it leads to a big protein win but creates tension between Lynsey and Terra.

A sneak peak at the upcoming season which includes a cast of returning competitors as they attempt to survive in Colombia for 40 days and 40 nights.

While mourning the loss of their chief provider, the remaining five survivalists learn they are not alone in the jungles of the Amazon and are given an opportunity to join forces with others.

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

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.

Survivalists embark on several dangerous hunts to secure protein and prepare for their arduous extraction on the horizon.

Scrambling from the start, 12 elite survivalists take on their harshest location yet, the sub-freezing Rocky Mountains of Montana. Jake injures his feet during insertion but tries to push through. Severe dehydration puts a survivalist's challenge at risk.

Steven fails to return with Darrin from their two-day hunting expedition, leaving the group with no choice but to break camp in a desperate search for answers.

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

Only two weeks in and South Africa is already taking a huge toll on our survivalists, mentally and physically. Frustrations between survivalists explode, deadly leopards circle, and cases of tick-bite fever threaten to take some out of the challenge.

Twelve brave souls take on their first XL challenge in the Colombian Badlands. Survivalists must battle disease-carrying insects, scorching heat, six-foot caiman and stalking jaguars. In this unprecedented challenge, they must trek 40 miles in 40 days.

The seven remaining survivalists enter the second week of their 40-day challenge in the bug-infested Amazon Jungle.

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.

Nine Naked and Afraid veterans attempt to survive the deadly jungles of Ecuador’s Amazon Basin for 40 days and 40 nights. To make it out alive, they’ll have to master the environment, push the limits of human endurance.

Brutal injuries and life-threatening illnesses end the 40-day challenge early for even the most elite survivalists. Through unseen footage and interviews, the survivalists offer insight and perspective on the most memorable moments when it all went wrong.

The Survivalists approach the halfway point of their brutal challenge. With starvation & sickness worse than ever they must come together to help one another, but the battle for Alpha Male distracts them from their strategy and may be their downfall.

Ryan encounters a wild animal while he's defenseless and without the help of the group.

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.

Days after the arrival of a new team member, division among the remaining six survivalists deepens as Russell leads the men on a risky two-day hunting expedition.

Snowstorms test the survivalists' will leading to a leadership change.

Three elite survivalists join the challenge; Dan and Waz take on dangerous prey; Amber battles an aggressive caiman to feed her team; Steven's main source of food turns sour.

A newly formed tribe quickly works together to stalk and kill a caiman. The pressure to trek 40 miles to extraction pushes two teams to make risky migrations. A survivalist is on the brink when medics discover parasites in their digestive system.