A survivalist postpones her wedding to try 21 days in the Colombian jungle.

After surviving a near-fatal fall, an equestrian stunt rider attempts to endure 21 days in Colombia.

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.

A hunter and a farmer pool their knowledge as they attempt to survive 21 days in South Africa. But when the wildlife proves too stealthy to hunt, the survivalists take a life-threatening risk for food.

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.

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.

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 this all-female tribe’s challenge, two veteran survivalists return to mentor two newcomers on the perils of San José Del Guaviare, Colombia, for 21 days. But, scarce food resources and torrential tropical storms take a quick toll.

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.

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.

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.

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.

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.

In an international tribes challenge, one survivalist must cope with menstruation in the middle of the African bush.

Three 14-day fan challenge survivalists return to conquer 21 days.

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

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?

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.

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

Two former addicts attempt to survive 21 days in the searing Black Hills of South Africa. On their road to recovery, they must contend with man-eating crocodiles, prowling lions and venomous snakes.

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.

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

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.