Laura Zerra

Twelve survivalists enter a punishing African location where tribes in the area live by a simple principle: banish the weak; as the 40-day challenge begins, deadly crocodiles and territorial leopards circle; a survivalist is targeted for banishment.

Scrambling from the start, 12 elite survivalists take on their harshest location yet, the sub-freezing Rocky Mountains of Montana.

After self-banishing, Kate is slammed by Africa's wrath; desperately hungry, Bulent gets a major score with his bare hands; Wes and Gwen's first big food win goes wrong, threatening their health and challenge.

An unlikely alliance scores the challenge's first big-game kill; Suzänne risks her survival.

With Joe on the brink, Ky and Gabby secure the first food win; looking to catch trout, Waz and Jake risk hypothermia to dam a frigid stream; medics must intervene after a fainting spell; a survivalist is forced from the challenge.

Twelve brave souls take on their first XL challenge in the Colombian Badlands; survivalists must battle disease-carrying insects, scorching heat, six-foot caiman and stalking jaguars; they must trek 40 miles in 40 days.