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 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.

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.

A wounded adventurer and a cautious newlywed attempt to survive 21 days in the remote Philippine wilderness and while tormented by fire ants, stitches and extreme hunger, their ability to endure is pushed to the brink.

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.

It's bachelor vs. divorcée on a 14-day fan challenge in the Philippines.

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.

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.

Two survival instructors put their skills to the test during a 21-day challenge in the Philippine jungle. Stalked by king cobras and plagued by a debilitating illness, the experts must learn new skills to endure this master class in survival.

In Mexico, four survivalists attempt to endure 21 days in the ancient Mayan jungle, where humans were once sacrificed to the gods. Battling relentless mosquitoes, torrential storms, and stinging wasps, the two teams must merge into a tribe to survive.

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.

A scrappy marine biologist from Mexico and a Viking fisherman from Norway attempt to endure 21 days in the American wilderness.