Laura Zerra

The Peruvian Amazon's aggressive piranha, venomous fer de lance and even poisonous plants test 12 survivalists. XL rookies look to last 40 days while vets try to make 60 and become Legends. Four survivalists will be gone in the first four days.

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.

Wes confronts Sarah as a mountain lion stalks the survivalists.

The Legends put their mark on the challenge; desperate to get food for Steven, EJ creates poison blow darts to chase a much-needed meal; Matt spearheads an ambitious dock build that drains Dan's strength; Jeff adds to the tension on Amber's team.

Jeff struggles to keep down food; Trish and Amber hit a breaking point; Matt, Dan and Waz cross piranha-filled waters to score a big kill; EJ and Steven's new camp is stalked by a jaguar; a survivalist leaves the group to go solo.