Nine Naked and Afraid veterans attempt to survive the deadly jungles of Ecuador’s Amazon Basin for 40 days and 40 nights. To make it out alive, they’ll have to master the environment, push the limits of human endurance.

The seven remaining survivalists enter the second week of their 40-day challenge in the bug-infested Amazon Jungle.

Lacey's night-fishing plan yields a boost in strength and team morale. Lack of food and sleep at Camp Laguna Negra makes Shannon spiral downward. Matt and Russell take to the water and score another huge protein win.

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While mourning the loss of their chief provider, the remaining five survivalists learn they are not alone in the jungles of the Amazon and are given an opportunity to join forces with others.

Days after the arrival of a new team member, division among the remaining six survivalists deepens as Russell leads the men on a risky two-day hunting expedition.

Four weeks into the brutal 40-day Amazon challenge, a violent two-day storm descends on the jungle. Before it's over, one more survivalist will be gone... leaving another hanging by a tenuous thread.

The remaining survivalists struggle to regroup in time for a brutal two-day, 15-mile water extraction journey.