After nearly three weeks in the bush, two survivalists have tapped out, most others are making desperate treks across the savannah in search of food. If they can't find sustenance, they'll be forced out of the biggest challenge of their lives.

The 10 remaining survivalists cross the 21-day milestone and enter into uncharted waters. Scarce resources send the survivalists on a collision course. They fight for their lives with a huge electric eel and are visited by a gigantic puma.

With 15 days to go in the 40-day challenge, the ten remaining survivalists - dehydrated and protein starved - find themselves converging at dangerous Piranha Lake where they will they compete over scarce food and water.

After thirty-one days in the Colombian jungle, the pressure is on to get the nourishment they need to survive extraction, but when one member doesn't play by the rules, the future of one group is thrown into jeopardy.

The final, and most difficult, part of the 40-day challenge begins. Jeff & EJ decide to attempt their extraction alone, and relationships grow contentious between both teams as they navigate the treacherous landscape to try and finish the challenge.

The Dirty Dozen survivors from Naked and Afraid XL come together for the first time since their life-changing 40 day challenge. They'll discuss good times, hard times, and try to heal unresolved issues.

In a special one-hour preview, 12 Naked & Afraid veterans prepare for the most formidable survival challenge on the planet - surviving 40 days and 40 nights in the sun-scorched bush of South Africa.

Nine Naked and Afraid veterans are introduced as they prepare for the return of the most formidable group survival challenge on the planet - surviving 40 days and 40 nights in the deadly jungle of Ecuador’s Amazon Basin.

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 2nd week of their brutal 40-day challenge in the bug-infested Amazon Jungle. After two tap-outs in the first four days, the Amazon proves to be harder than they thought. Now their priority is to find food.

Lacey’s successful night-fishing plan yields an incredible boost in strength & team morale, but lack of food & sleep at Camp Laguna Negra makes Shannon continue to spiral downward.

As they approach the halfway point of their brutal 40-day challenge the remaining six survivalists merge into a single team only to be dealt a devastating setback when deadly bacteria threaten to take out their leader.

Still mourning the loss of their chief provider, the remaining five survivalists endure yet another shocking development when they learn they are not alone in the jungles of the Amazon, & are given an opportunity to join forces with others.

Days after the shocking 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.

After Russell's shocking decision to quit the Amazon challenge, the remaining survivalists struggle to regroup in time for a brutal two-day 15-mile water extraction journey. Electric eels, anaconda & caiman all pose threats in this jam-packed finale.