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. But with each sleepless bug-filled night tensions between them mount, and in the end, the greatest threat to their survival might be each other.

Luke, a go-getter from Southern California, and Alyssa, a positive survival instructor, take on the rugged coast of the Yucatan. As dehydration, hunger, and the threat of caiman kick inandhellip; will the survivalists win or lose to this perilous coastline?

Two survivalists take on the hot and hellish conditions of Guyana's equatorial savannah. Slammed from day one by the heat, they battle debilitating health issues, a team dynamic breakdown, critical survival malfunctions and a massive psychological decline

Avid outdoorsman Trenton and novice survivalist Jen take on high elevation in the peaks of Udhampur, India. With relentlessly cold nights and an unexpected wildfire, their chances of surviving the 21-day challenge might go up in flames.

A workaholic mom and a loner are challenged to survive three weeks in Thailand. Competing with monkeys and rats for food, it's a daily struggle not only to survive, but to understand each other. Will they be able to come together as a team?

Charlie, a no-nonsense New Yorker, and Danielle, a nature-loving vegetarian, attempt to survive for 21 days in the deadly Colombian jungle. With polar opposite personalities, will Charlie and Danielle work as a team, or will the jungle tear them apart?

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.