All-stars Fernando and Dani land in a rainforest in Ecuador for their third challenge, where jaguars, caiman, anacondas and bullet ants are on the prowl; their divergent approaches to primitive survival might do them in.

Survivalist Lynsey copes with her lone-wolf partner Darvil in South Africa.

Three young survivalists test their skills in the coastal rainforest of Ecuador, where they risk their lives scaling a massive rock cliff to forage for food.

Two teams of international survivalists attempt to endure in South Africa.

Two fan survivalists are in over their head in brutal South Africa.

Torrential downpours hammer the survivalists as soon as they're dropped into the Georgia rainforest. Pushed by the weather, mountain lions, black bears and poisonous copperheads, the pair create a bond that leads to a life-changing decision.

The mile-high altitude of the Rockies tests two strangers' ability to adapt.

The frigid Montana wilderness pushes the survivalists' partnership over the edge. As they struggle to work together, wildlife including bears and aggressive moose circle their camp. Plummeting temperatures create the need for drastic action.

A Hawaiian biologist takes on the blistering Chihuahua Desert.

All-Stars Wes and Suzänne take on Ecuador's relentless rainforest

Tarantulas and desert heat test an adventurer and archaeologist in Texas.

When nature calls, a fan's risky survival strategy backfires.

An Australian bushman and an American biologist form an intimate bond as they take on the Namibian desert together. The relationship grows as they search for scarce food along a thin stretch of raging river whole territorial baboons track them at every turn.

A pair pushing 50 and a pair in their 20s take on the Sonoran Desert.

Surrounded by crocodiles, leopards and venomous snakes, survivalist band together against the South African bush. But scorpion and aggressive tick -- in the most vulnerable parts of the body -- put their challenge at risk.

Florida's brutal black water swamp pushes a hard-headed homesteader and an elite military Alpha male to their limits. Threatened by venomous snakes, dangerous wild boar and torrential rains, the clashing survivalist must work together or fail alone.

Trying to survive 21 days completely solo, All-Star survivalist Luke McLaughlin takes on the dangerous badlands of South Africa. Stalked by ferocious lions and hyenas, Luke must get a kill if he has a chance to finish the challenge.

All-star survivalist and wildcard Gary Golding takes on a jungle for the first time completely alone in Belize. Without a partner, Gary forms a bond with a turtle he names Timmy but a deep cut and dangerous infection threaten Gary's challenge.

Immediately circled by lions and hyenas, all-star survivalist Lacey Jones is isolated, vulnerable and sleep-deprived as she takes on the African bush; completely alone, Lacey is pushed to a breaking point where madness awaits on the other side.

Desperate for a kill on the African savannah, all-star survivalist Ryan Holt risks his safety to get in position for a better shot; a fire in his shelter could take Ryan out of the challenge.

Constantly on the run to avoid territorial rhinos, elephants and lions, survivalist Max takes on the punishing African savannah; Max gets a kill, but it puts his challenge at greater risk; predators close in to take his hard-earned win.

In the frigid Bulgarian mountains, packs of wolves and territorial boars, stalk all-star survivalist EJ Snyder; without a partner to protect him and struggling to make fire, EJ becomes a target for the deadly predators.

In an unprecedented Naked and Afraid challenge, identical twin sisters Amber and Serena, as well as brothers Warren and Thomas, are dropped in the African savannah. They take on rhinos, hyenas and a territorial leopard stalking their camp.

The Amazon rainforest pushed All-star survivalist Ky to the edge with swarms of mosquitos, blood-thirsty piranhas, and aggressive pumas. Hunger and desperation lead to a risky night hunt in caiman-filled waters.

Underestimated his whole life, a survivalist with dwarfism tries to prove himself in the Amazon but struggles against predators and his partner.

In the Bahamas two fans face relentless insects and aggressive sharks during hurricane season.

In the darkness of the Belize jungle, all-star survivalist Kim Kelly is hammered by torrential downpours, relentless ticks, and terrifying howler monkeys; Kim quickly spirals into sleep deprivation which puts her at risk in the unrelenting jungle.

When a third survivalist is added to the mix, romantic complications make surviving the Colombian jungle's poisonous dart frogs and deadly jaguars much more complicated. Feeling left out, a survivalist's emotional breakdown puts his challenge at risk

In a brutal Mexican jungle known to be haunted by Mayan spirits, All-star survivalists Sarah and Trent are tormented by rain, predators and spirits of the rainforest.

Two strangers are dropped in one of the most dangerous African locations in the dead heat of Summer. Faced with aggressive hippos and charging elephants they quickly learn their place, but must mark their territory if they want to make it 21 Days.

On the edge of the Bermuda Triangle, an Army veteran dive master and a Cajun boat captain take on relentless thunderstorms and battle dehydration as they try navigate more than 20 miles of open ocean in the ultimate test of sink or swim.

Two survivalists gets frustrated while trying to navigate the flooded jungles of Belize; the man-and-woman team faces a maze of poisonous snakes and rabid bat infested caves, all in the name of conquering their fears.

Deep in Mexico's Baja desert lies the scorching wasteland of the Devil's Canyon. A Canadian mountain man teams up with an experienced homesteader to take on the canyon's triple-digit heat, scarce water, and venomous predators

In a unique four-person challenge, a lion attack survivor returns to Africa to face her fears. Surrounded by lions, crocodiles and cape buffalo, the tribe of four struggles against constant threats and each other as they try to survive in a kill zone

A powerful earthquake in the Philippine jungle rattles a thrill-seeking chef and a competitive hockey mom, but the territorial monkeys, rainstorms, lack of food, and dehydration lead to a disastrous face-first fall.

Superfans Molly and Nate are dropped deep in the Amazon rainforest, a place that's taken down the best of the best; they lean on lessons learned from their couches to push through torrential rain, relentless bugs, and extreme sleep deprivation.

In the frigid mountains of Bulgaria, wolves circle a successful fan survivalist trying to conquer the 21-day challenge. Large fires are their defense against predators and hypothermia until the flames fan out of control and become the biggest threat.

In a lethal African hunting ground, a biker chick and a taxidermist have to stay on the move to survive. The pair must push across 21 miles of savannah to find food and water while avoiding a pride of lions that's tracking them every step of the way.

A married couple goes from watching the challenge from their couch in Idaho to taking it on in the perilous Philippine jungle. Torrential rain, relentless bugs and deadly boars put their survival skills -- and their marriage to the ultimate test.

In the relentless Colombian jungle, a mom and National Guard vet teams with a firefighter. Violent storms and hypothermic conditions force them to huddle in bat-infested caves. A special bond develops between a survivalist and a wild monkey.

In the frozen American Rockies, snow storms and freezing temperatures force the survivalists to make risky choices with their fire and food sources. An out of control blaze and toxic mushrooms put their challenge and safety at risk.

Surviving 21 days Naked in the wilderness leads to weird and awkward moments. From bizarre pre-challenge prep and mortifying naked intros, to night-time cuddling gone wrong and learning wildlife bathroom routines the hard way, Naked and Afraid gets weird

Dropped onto a frozen Alaskan Glacier, All-Star survivalists Laura Zerra and Steven Hall scramble to stave off frostbite and hypothermia. And 7,000 miles south, two new survivalists take on a sun-scorched Brazil island, with anaconda and deadly stingray.

On a sun-scorched Brazilian island, aggressive anaconda and deadly stingray torment survivalists Whitney and Nathan, pushing both of them to their breaking point. Working together they use their hunting and fishing skills to try and make it 21 days.

Two pairs of survivalists are surprised when they must take on the deadly jungles of Panama side-by-side. But before their 21-day challenge begins, they have to re-think their survival strategies along gender lines.

When a third survivalist crashes the challenge, tensions and jealousy are just as threatening as the piranha and jaguars of the Ecuadorian rainforest; 1,800 miles away, an Alaskan homesteader is punished by the 130-degree heat of the Mexican jungle.

A deadly spider bite puts Gwen, an Alaskan homesteader at risk of tapping but she works with her partner to get her revenge, in the 130-degree heat of the Mexican jungle.

Elite survivalists Matt Wright and Gary Golding are tested by deadly spitting cobras and territorial elephants in an African killing zone. But Matt and Gary aren't alone each must protect a novice survivalist from the threats surrounding them.

A survivor of rattlesnake, shark and bear attacks teams with Brooke, wife of “Naked and Afraid” veteran Matt Wright, in a vicious African feeding ground. Then, a haunted Colombian jungle tests survivalists with threats from predators and the supernatural.

A haunted Colombian rain forest punishes the survivalists with threats from deadly jaguars, 300 species of snakes and relentless biting insects. But their challenge is threatened when they don't heed the curse of the jungle.

Survivalists expect to struggle against the natural threats for 21 days but when they also face supernatural phenomena – haunted locations, ancient curses and evil spirits – their resolve is tested both physically and mentally.

Kel and Eric try to avoid becoming preys to Africa’s wild animals

All-Star survivalists Jake Nodar and Melissa Miller take on the punishingBlackwater Swampin Florida, which teems with poisonous snakes and aggressive alligators. When one of the survivalists becomes disorientated, local authorities are called in to conduct an all-out search.

Two fan survivalists are dropped on a Mexican island filled with venomous coral snakes, territorial jaguars, blood-sucking chiquistas and a duck named Henry that they desperately want to eat for dinner.

The first couple to ever take on the 21-day challenge tests themselves and their relationship as they take on the Guyana jungle. They must work together to battle jaguars, anacondas, caiman, and more than two-million species of insects.

Avoiding the dangers of a rushing river, two survivalists brave a vast cave system in the Colombian rainforest; trying to survive 21 days, the jungle tests them with threats including venomous fer-de-lance snakes, piranhas and biting insects.

Dropped into a high-altitude jungle in Colombia, Tommy and Leah face territorial Pumas and venomous fer-de-lance snakes, but the biggest threat is the extreme temperature changes, where highs hit nearly 100 degrees and lows plummet into the 40s.

Being naked in the jungle with a complete stranger can lead to funny moments, and laughter can be a critical skill when trying to survive through blood, sweat, tears, snake bites, burns, and rashes in hard to reach places.

In the mountainous rainforest of Honduras, a survivalist with an unusual past is paired with a hard-headed police detective to try and survive 21 days, but predatory jaguars, swarms of fire ants and a debilitating injury threaten their challenge.

In sun-scorched Brazil, survivalists Wes and Jesse try to complete their 21-day challenge, but a jaguar crossing into their camp puts them on high alert. Starvation forces Jesse to attack a beehive in search of honey and the entire colony retaliates.

In sun-scorched Brazil, survivalists Wes and Jesse try to complete their 21-day challenge, but a jaguar crossing into their camp puts them on high alert. Starvation forces Jesse to attack a beehive in search of honey and the entire colony retaliates.

Dropped into Guyana's scorching savannah, two Naked and Afraid superfans fight the oppressive heat and constant insect attacks. Scorching temperatures lead to severe dehydration and force a desperate fan to risk illness by drinking unsanitary fluids.

A category five Hurricane blasts through the camp of Amal, an Iraqi war refugee now living in Iowa and her partner, Duke. In addition to the hurricane, the pair also endure venomous spiders, insects, and nocturnal predators in the swamps of Florida.

In a haunted Mayan jungle, a painful injury tests the resolve of survivalists Leah and Caesar. Surviving is a struggle as they are faced with suffocating humidity, hungry predators, torrential rainfall, unrelenting insects and intoxicating fruit.

In the snake-filled Mississippi swamps, Gabrielle, a former fan survivalist takes on the full 21-day challenge. Gabrielle and Brian are faced with deadly snakes, unrelenting mosquitos, nocturnal predators and a relentless week-long thunderstorm.

Terribly poisoned without food or water, in the arid and desolate, savannah region of Brazil, survivalists Gary and Karra will be tested unlike any other survivalists before them. Depleted and broken will either of them make it to Day 21?

Max and Bianca face off with aggressive caiman, boa constrictors, large spiders, and thorny mangroves in this Superfan challenge on a tropical island in Panama.

One survivalist falls into a roaring fire after weeks of depleted energy due to no food. With just days to go, the pair makes a daring plan for how to survive...but will it cost them the challenge?

Instant attraction gives way to unforgiving conditions on a Nicaraguan island teeming with bull sharks and big cats. As the struggle to survive hits a low point a brutal flood threatens to wipe out the camp and all chances of survival.

Tormented by hostile crocodiles, territorial howler monkeys and no tree canopy to protect them from the sun in this post-hurricane Nicaraguan jungle, one survivalist suffers third-degree sunburn while the other's life is threatened by a mysterious illness

Surrounded by aggressive and territorial black bears day and night, two survivalists must compete against the apex predators for resources in the Smoky Mountains of Tennessee.

Swarming wasps, deadly anacondas, poisonous toads and venomous stingrays surround the survivalists in sun-scorched Brazil. Just days into their challenge, a standoff with a poisonous Fer-de-lance snake threatens to send both survivalists home.

Torrential downpours and brutal wind storms push two starving survivalists to their breaking points in the Honduran jungle.

A freak injury puts super-fan survivalists Maci and Justin at risk as they attempt to survive the treacherous Nicaraguan jungle for 14 days.

A dangerous burn and clashing survival strategies plague survivalists Angela and Steven in the jungles of Panama.

Stalked by aggressive leopards and unable to get fire for protection, two survivalists fight the elements and each other as they look for double redemption on a predator-filled plain in South Africa.

For the first time on the show, a divemaster and a Navy Seal become stranded at sea, facing exposure to deadly sharks and heatstroke.

A surfer from Hawaii and an ex-military take on the Texas countryside, surrounded by armadillo, bighorn sheep and vicious wild boar; as they battle starvation and face a potentially fatal flood, their skills get fully put to the test.

Two complete strangers - man and woman- are left naked and stranded on a desert island.

A mom and an adventure addict drop into the cloud forest of Ecuador; unbearably wet conditions, violent lightning, cabin fever, trench foot and finger-slicing machetes threaten to keep the pair from completing their 21-day challenge.

An Army vet and a newly married man grapple with gender norms as they take on the mountains of Croatia; extreme hunger and frigid temperatures force this unlikely pair to bond together, but a vicious storm threatens to rip them apart.

A category-five hurricane blasts through Amal and Duke's camp; in addition to the hurricane, the pair also endure venomous spiders, insects and nocturnal predators in the swamps of Florida.

An extreme athlete and a book smart bartender tackle an Ecuadorian cloud forest where it rains daily. Will their inability to know their own limits eventually get the best of them or will Mother Nature strike the final blow in this Naked and Afraid first?

Former Marine Tim, and Shannon, a stonemason take on armies of stinging red ants and bubbling mud volcanoes on the Caribbean island of Trinidad. Even with this daunting location working against them, their biggest struggle is actually each other.

A survival instructor and a retiree of the armed forces are inserted into the volcano-ravaged island of Montserrat; they have different survival styles but find a way to work together, then one accident has an eruptive effect on both.

Two fans, a single mom and an optimistic novice, are selected to take on a special fourteen-day survival challenge on the coast of South Africa.

A California Buddhist and an Oregon fisherman test their skills against the unforgiving Australian outback, where harsh conditions, scarce food sources and saltwater crocodiles threaten their survival.

An ex-marine and a perky Southern girl face constant downpours, cabin fever, threats from predators, lack of sleep and extreme hunger in the Panamanian Jungle.

A survivalist and an Air Force veteran try to survive in the swamps of Louisiana, but there is trouble in the partnership.

Jeremy and Melanie continue their challenge in the haunted swamps of Louisiana, enduring threats from predators as they search for food.

A survival-savvy yoga teacher and a custom knife maker tackle the brutal jungle of Colombia. Their primitive survival skills are impressive, but the deadly spiders and tics test both their courage and resilience, threatening to take them down.

A former military man and an optimistic naturalist face humidity, violent storms, caiman, and red-bellied piranha in the Amazon jungle.

A book-smart greenhorn and a rock climber take around Namibian savannah. A former survivalist returns.

When sparks don't fly deep in Panama's Isla San José, an ex-cop Gary Underhill and a "wild child" Kim Kelly clash over cuddling.

Trent Nielsen and Annie Foley are afraid of the dark in the mysterious Mayan jungles of Belize.

Mountaineer Joe Brandl and former cop Andrea Lopez survive in Namibia, which is home to dangerous predators, but inner demons seem to cause more trouble.

Tara Skubella and Dustin Hobbs must endure the jungles of Panama's Isla San José, where disease-carrying insects may prove to be the team's greatest threat.

Hunter Jeremy McCaa and surfer girl Cassidy Flynn must survive on West Nalaut Island in the Philippines.

After a typhoon scatters debris through a Philippine forest, a stay-at-home mom and stubborn trucker try to find a way to survive there. Combating sickness and no food, they come together and ward off hunger by eating a skunk.

An Army mom and a U.S. marine battle alligators, snakes and mosquitoes in the Florida Everglades.

Christina and Steve take on the Mexican jungles of Quintana Roo for 21 days.

Luke, a go-getter from Southern California, and Alyssa, a positive survival instructor, take on the rugged coast of the Yucatan.

Two survivalists take on the hot and hellish conditions of Guyana’s equatorial savannah.

Avid outdoorsman Trenton and novice survivalist Jen take on high elevation in the peaks of Udhampur, India.

A workaholic mom and a loner are challenged to survive three weeks in Thailand.

Charlie, a no-nonsense New Yorker, and Danielle, a nature-loving vegetarian, attempt to survive for 21 days in the deadly Colombian jungle.

A Navy veteran and a military mother survive on an island in Mexico where they encounter a panther and attempt to avoid poisonous tree sap.

A past contestant returns to the show and along with her partner attempts to survive the jungles of Guyana.

An independent mother and a Green Beret battle sand flies, venomous snakes and an infestation of caiman in Guyana.

Two fans are selected for a two-week long challenge in Nicaragua.

Lindsey Leitelt and Luke McLaughlin challenged in a dense harsh land in Namibia.

Dani Julien and Justin Bullard stranded with starvation and tiny predators in the Bahamas' Andros islands.

Carrie Booze and Tom Touw survive with crocodiles and extreme heat in Cambodia.

Jaclyn McCaffrey and Adam Young survive in Nicaragua for battling with dehydration and freezing temperatures.

Survival coach Tom McElroy and pediatrician Lisa Coray fight with storms and dehydration in Argentina's Yungas forest.

Corinne Kohlen and Chris Fischer are stranded on a deserted beach in Dominica. Corinne tapped out on day 13, and Chris left alone for full 21 days.

Hakim Isler and Phaedra Brothers tackle the high altitude and extreme cold of the Himalayan foothills in northern India. Phaedra battles food poisoning from before her arrival and suffers through bladder and kidney infections.

Joshua Bell and Amanda Leigh face the hot and swampy jungles of southern Nicaragua while armed with only a machete and a roll of duct tape. Joshua leaves early on day 5 for dehydration and Amanda survives all alone for the rest of the 21 days.

Ashley Burns and Michael Jefferson attempt to survive dazzling heat in Botswana. Ashley medically evacuated on day 3 after suffering dizziness, while Michael tapped out on day 12 after hurting his kidney.

Honora Bowen and Matt Strutzel survive hunger and dehydration in Brazil's North Region. Despite Honora passed out from severe heat, Matt completes the challenge all alone.

Amanda "AK" Kaye and Tyler Steinle failed to survive in the Amazon rainforest after tapping out, season 1 castaways EJ Snyder and Laura Zerra arrive to complete AK and Tyler's 21 day journey.

Jeff Zausch and Eva Rupert test their survival skills in the harsh desert of Madagascar's Massif D'Isalo. Their camp was badly burned when they attempted to cook snake meat and they barely survived.

Alana Barfield and Keith Busch have a deserted island in Fiji all to themselves. Keith left early on day 11 for seizures; Alana survives alone for full 21 days.

Shannon Thomas and Leonard "Cass" Cassidy are challenged to survive in a flooded jungle of Belize.

Firefighter Fernando Calderon and single mom Samantha Pearson endure relentless storms in a Malaysia rain forest.

Vincent Pinto and Sabrina Mergenthaler face flash floods and heat exhaustion in a Bolivia jungle. Vincent suffered from stomach ache on day 16, and Sabrina suffered severe abdominal pain on day 20, one day short to end the 21 day challenge.

Recap, extra footage and commentary with the season 2 survivalists including their families.

Shane Lewis and Kim Shelton have to survive 21 days in the Costa Rican jungle, where a producer has survived a venomous snake bite.

Survivalists EJ Snyder and Kellie Nightlinger survive in Tanzania's Serengeti Plain, putting their skills to the ultimate test.

Jonathan Klay and Alison Teal are marooned in the Maldives for 21 days and clash with sunburn and starvation.

Clint Jivoin and Laura Zerra have to stay 21 days on a Panamanian island, plagued with sand flies and threatened by snakes.

Survivalists Puma Cabra and Julie Wright have to survive 21 days in Borneo. They battle with sickness, starvation, and wildlife.

Billy Berger and Ky Furneaux survive 21 days in the swamps of Louisiana. They risk attack from deadly snakes and alligators.

Recap, extra footage and commentary with the season 1 cast including their families.

Cassie DePecol, Forrest Galante, Manu Toigo and Russell Sage on the Panamanian coast.

Recap, extra footage and commentary with the episode 8 cast, including their families.