Veterans of all three seasons of Naked and Afraid XL come together for the first time to compare their experiences and share new insight into what makes this epic 40-day survival challenge the ultimate test of skill and human endurance.

The 10 survivalists reunite for the first time since leaving the Amazon; through roundtable discussion, new interviews, and never-before-seen footage, they offer insight into the highs and lows of their 40-day challenge.

A violent two-day storm descends on the jungle; electric eels, anaconda and caiman all pose threats.

Four weeks into the 40-day Amazon challenge, a violent two-day storm descends on the jungle.

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 and caiman all pose threats in this jam-packed finale.

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.

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.

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.

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 unrelenting jungles of the Amazon and are given an opportunity to join forces with others.

The six remaining survivalists merge into a single team at the halfway point of the brutal 40-day challenge; a deadly bacteria threatens to take out the group's leader.

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.

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.

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

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

The seven remaining survivalists enter the second 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.

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.