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.

Two foreigners try to become the first survivalists to endure 21 days on U.S soil. But rattlesnakes, unfamiliar terrain and plummeting temperatures threaten to send them back across the pond. Lilly from Austria and Sam from the UK team up to do battle with the New Mexico wilderness.

All-Star survivalists Jake Nodar and Melissa Miller take on the punishing Blackwater Swamp in 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.

The first-ever double amputee survivalist and an ex-Marine battle torrential storms, deadly snakes and swarming mosquitos as they strive to make it to 21 days in the dense jungles of Belize.

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.

Naked and Afraid legend Steven Lee Hall Jr. joins two first-time survivalists for 21 days in the brutal backwoods of Kentucky. Its deadly copperheads and violent storms push even the King of the Forest to his breaking point.

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.

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.

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.

Legend survivalists Max and Rylie are dropped in the South African bush with two novice fans to try and survive 21 days with spitting cobras, aggressive warthogs, rhinos and leopards.

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.

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.

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.

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.

A super fan teams with a supermom to take on the jungles of Mexico's Yucatán Peninsula for 14 days. Battling brutal storms, ravenous bats and unrelenting hunger, they must rely on sheer grit to survive this fan challenge.

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.

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

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

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

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.

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.

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

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.

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

A circus performer and an avid hunter take on 14 days in Tobago

Two survivalists are stranded at sea and have to survive for 21 days with no food, water or clothes. They must put their skills to the test to overcome deadly sharks and heatstroke that threaten their survival.

A special ops veteran teams up with a single mom to fight torrential rains, flash floods and sickness in Thailand's Sai Rung River Valley. The pair puts their skills to the test before the river leaves them stranded from the crew.

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

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.

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

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

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.

When a third survivalist crashes the challenge, tension and jealousy are just as threatening as the piranha and jaguars of the Ecuadorian rainforest. Claims that there's more going on than just survival puts everyone's challenge at risk.

Naked and Afraid legend Laura Zerra returns to mentor a blacksmith and a former MMA fighter as they attempt to survive 21 days in Yucatán, MX.

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.

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.

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

Four survivalists seek redemption for their past failures. However, their promises to make it through 21 days on a remote Philippine lake are put to the test when they accidentally ingest a toxic substance.

A military veteran with a crippling fear of snakes and a Canadian cattle rancher try to survive 21 days in the unforgiving Philippine jungle. A mystery visitor torments them nightly; wracked with hunger, they attempt to trap it.

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

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.

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.

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

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?

A Hawaiian biologist takes on the blistering Chihuahua Desert.

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

A marine biologist and a special forces veteran risk hypothermia at every turn as they take on Ontario, Canada, with no clothes. Bitter cold, torrential rain and wandering bears and moose make every night a struggle.

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

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.

Two women and two men face off in South Africa to see who can survive 21 days. Pursued by leopards, lions, and hyenas, who will tap first — the men or the women?

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

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

A former Marine sniper and a Mississippi mom try to endure 21 days in a haunted Colombian swamp. But extreme humidity, insects and infection prove more difficult to endure than any legends.

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

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.

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.

Two pairs of strangers, dropped on opposite ends of the remote Panamanian rainforest, eventually meet and must work together to conquer the Everest of extreme survival challenges.

On this fan episode of Naked and Afraid, pro surfer Anastasia Ashley, and YouTuber Cory Williams take their shot at surviving Naked and Afraid. Do they have what it takes to survive completely unplugged from civilization in the jungles of Belize?

Two city slickers from the urban jungles of New York City see if they have what it takes to survive for 14 days in South Africa.

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

Omar and Raven attempt a 14 day fan challenge in Colombia, discovering what's worse: relentless mosquitos or personality conflicts?

After poisoning the water in her fan 14-day challenge, survivalist Ashley seeks redemption in Tobago with a new partner. But making it to 21 days in a rain-sodden jungle will push them beyond their limits.

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.

After surviving a 14-day fan challenge, three survivalists attempt to endure 21 days in the rainy, mosquito-infested Belizean jungle. But when one is forced to leave due to a family emergency, a new survivalist arrives at the camp.

An ICU nurse and a banker attempt a 14-day fan challenge in the rugged Mexican jungle. But as food becomes scarce they question their will and skill to make it to the end.

Three women attempt to survive 21 days in Zambia; when their fourth partner arrives unexpectedly, the all-female dynamic is shattered.

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.

A wilderness EMT and a hard-headed homesteader try to survive in a coastal Colombian jungle. But when their priorities clash, their partnership becomes volatile.

Two survivalists team up to tackle the swampy shore of Croatia. A strong partnership is forged through braving the elements and facing their demons, but everything takes a turn for the worst after a freak accident.

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.

A professional backpacker and an experienced hunter attempt to survive 21 days without their high-end gear in a swampy Argentine savanna teeming with mosquitoes, aggressive bees and violent subtropical storms. Argentina provides the backdrop for survivalists Malorie and Patrick as they contend with an unforgiving jungle.

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

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.

Two survivalists take shelter in a labyrinth of caves in Colombia.

Fan survivalist Matt, notorious for his former partner sharting in their water source, teams up with environmentalist, Kerra, to take on 21-days in Zambia. Dropped in a valley teaming with leopards, will he have another environmental disaster?

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

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.

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.

Four male survivalists who tapped in previous challenges seek redemption in South Africa. Humbled by their past failures, can they make it to 21 days and triumph as a tribe? Limpopo, South Africa threatens to keep four returning survivalists from the redemption they desperately seek.

Two superfan critics test their armchair survival knowledge in Colombia.

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.

A stay-at-home mom and a trucker try to survive in a Philippine forest after a typhoon scatters debris everywhere. Combating sickness and no food, they come together and ward off hunger by eating a skunk.

A wilderness guide and a software engineer try to endure 21 days in the Botswana desert. But at night, their safety is threatened by roaming lions and aggressive elephants.

The punishing desert hellscape of Baja, California threatens to take out two more survivalists in this location redemption challenge.

For the first time, two young adult kids of veteran survivalists try to prove they are as good as their parents when they take on 21-days in a dense Mexican rainforest where they face pumas, jaguars, and deadly fer de lance snakes.

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 mother of four and a country boy are dropped into the jaguar filled jungle of Belize. While they hunt for food, something is hunting them, and the mental part of the challenge gets to them both. Can they survive the jungle and themselves?

Jaclin, a paralegal, and Michael, a fishing boat captain, take on 21 days in the mighty Kalahari desert of South Africa, one of the largest stretches of sand in the world.

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.

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

A former member of the Amish and an Australian fitness coach attempt to survive 21 days together in the harsh Colombian jungle.

An adventure guide and a veteran take on Australia's Outback and face brutal terrain, freezing temperatures and lack of sleep. However, their greatest danger may be each other when cultural differences cause tempers to flare.

Heather, a pro-angler from Texas, Sean, son to the late astronaut, William McCool, and Dallas, a reformed ex-con, take on 21 days in the searing heat of Limpokwena, South Africa.

Two survivalists take on the Belize Jungle to survive for 21 days with no food, water or clothes. They must put their skills to the ultimate test to overcome a catastrophic hurricane and predator-filled environment.

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 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.

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?

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.

Crippled by injuries and toxic frogs, an adrenaline junkie and a self-proclaimed renaissance redneck must dig deep to try to endure 21 days in Colombia.

Two die-hard fans doubt their survival skills after 10 days with no food.

A professional boxer and a former cop try to survive 21 days in Africa while threatened by a herd of aggressive hippos.

A resilient mom from Washington and a quirky spider-lover tackle the remote Seminole Forest of Florida. Terrorized by huge gators and 550-pound black bears, they are driven to their physical and emotional breaking points.

A football coach and midwife attempt to overcome the curse of Chiapas, Mexico, a location so daunting that no survivalist has completed 21 days. But their radically different approaches to survival hurt their ability to endure.

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

Two survivalists try to endure 21 days in the wreckage of an abandoned village in Botswana's Okavango Delta, where aggressive hippos have claimed the territory.

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

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.

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.

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.

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 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.