Four survivalists brave a vast cave system in the Colombian rainforest and take on the Belize Jungle, putting their skills to the test to overcome a catastrophic hurricane and predator-filled environment.

All-star survivalists Jeff Zausch and Laura Zerra embark on an unprecedented 60-day challenge on Palawan Island in the Philippines during typhoon season, where deadly green vipers and aggressive foot-long centipedes thrive.

In a punishing Brazilian savannah, survivalists Wes and Jesse deal with searing heat as well as paralyzing wasps, aggressive bees and poisonous snakes; starvation forces Jesse to attack a beehive in search of honey and the entire colony retaliates.

A single mother and a novice survivalist try to survive South Africa; two survivalists take on the swamps of Florida to survive for 21 days with no food, water or clothes; two survivalists take on the Honduran jungle.

Elite survivalists Matt Wright and Gary Golding are tested by deadly spitting cobras and territorial elephants in an African killing zone; however, Matt and Gary aren't alone, and they must protect novices from the threats surrounding them.

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

Bug swarms and a lack of food test Gary and Karra's survival skills in the arid, desolate savannah region of Brazil; after days of starvation, one of them eats unripe fruit and pays the price by becoming desperately ill.

A survivor of animal attacks teams with Brooke, wife of "Naked and Afraid" veteran Matt Wright; pinned down by elephants, hippos and lions in Africa, survivalists Mama Kel and Eric work together to avoid becoming prey.

The first "Naked and Afraid" couple faces challenges to themselves and their relationship as they take on the relentless Guyana jungle; they must work together to battle jaguars, anacondas, caiman, and more than two-million species of insects.

In a post-hurricane Nicaraguan jungle, survivalists are tormented by crocodiles and howler monkeys; one survivalist suffers from a third-degree sunburn because there's no tree canopy, while the other one's life is threatened by a mysterious illness.

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

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

One survivalist falls into a roaring fire after being depleted of energy due to a lack of food; with just days to go, the pair of survivalists makes a daring plan on how to survive, but it may cost them the challenge.

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.

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.

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

In a punishing Brazilian savannah, survivalists Wes and Jesse deal with searing heat as well as paralyzing wasps, aggressive bees and poisonous rattlesnakes; a territorial jaguar family circling their shelter may cost them the 21-day challenge.

A single mother and an optimistic novice try to survive on the wild coast of South Africa; an unlikely pair of survivalists must coexist on the unforgiving African savannah of Namibia with a lack of food and fire.

A survivor of rattlesnake, shark and bear attacks teams up with Matt Wright's wife, Brooke; together, they take on lions and hyenas in a vicious African feeding ground where the environment quickly puts their skills to the test.

All-star survivalists Jake Nodar and Melissa Miller take on a punishing Florida swamp teeming with poisonous snakes and aggressive alligators; when one of the survivalists becomes disoriented, authorities are called in to conduct an all-out search.

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.

TV's most extreme survival challenge just grew extra-large. Veteran survivalists familiar with the stripped-down drill after appearing on "Naked and Afraid" attempt to survive in a desolate, dangerous environment for 40 days -- 19 more than they previously experienced on the show. Pushing the very limits of human endurance, the men and women must all vie for the same limited food, water and shelter while avoiding territorial-sensitive predators and venom-filled reptiles. Because there is no other choice, the competitors quickly get to know one another -- and their surroundings -- and hope that their instincts, survival skills and intestinal fortitude serve them well.

Eleven teams of two travel the globe to try to win $1 million.

Famed survivalist Bear Grylls says goodbye to Hollywood and takes celebrities on journeys into some of the wildest locations in the United States and around the world. Whether it's searching for food in the most remote environments or battling intense weather, each episode chronicles the celebrity's experience of pushing their body and mind to the limit to successfully complete the adventure.

Back to the beautiful state of Alaska for another reality-documentary series, this one set in the Arctic National Wildlife Refuge, a protected area home to thousands of native animals... and a handful of people. In 1980, the U.S. government banned human occupation in the refuge, and only residents in seven permitted cabins are allowed to remain. The series depicts the daily rituals of four families living in isolation and contending with bitter weather, frustrating setbacks, and aggressive wildlife in an unspoiled and unforgiving wilderness. The nonconformists include Heimo Korth, the "godfather of the final frontier," and wife Edna; Bob Harte, who has spent 40 years living by his own rules; and young couple Bob and Ashley Selden, who admit that they've survived by trial and error, learning day by day the harsh reality of frontier living.