12 of Naked and Afraid's best battle their biggest challenge yet - 60 days in Louisiana's punishing swamps. Surrounded by aggressive alligators and snakes, it's rodent bacteria attacking the All-Stars' most private areas that threatens to take them out.

Matt puts himself at risk of a challenge-ending injury for a potential big alligator win. Massive storms send Steven on a desperate search for resources. The swamp claims its first victim as one all-star calls it quits.

Matt, Rylie and Ryan battle an alligator to get a challenge-changing source of protein. Scavenger Gary's discovery of an animal carcass leads to a risk/reward standoff with his team. Sarah scores a desperately needed food win.

With a huge 8-foot alligator win, Gary eats parts that are too much for his team and his stomach. Complications from Matt's parasite grow more serious. Steven and Jeff stalk much-needed prey. A survivalist is forced from the challenge.

Spotting nutria tracks, Matt wants revenge and his next meal. Jeff uses ingenuity to create a one-of-a-kind swamp smoker. Amber's fishing skills have her team well-fed, but an injury from her military service threatens her challenge.

A brutal injury threatens EJ's challenge and manhood. Jeff and Steven are stalked by a territorial black bear. Rylie, Matt and Ryan land their second huge win of the challenge. Max and Gary plan a risky raid of an active beehive.

To cross the gator-filled swamp, Rylie, Matt and Ryan engineer an epic 50-foot bridge in a desperate attempt for resources. Harassed by a black bear, Jeff and Steven must abandon their camp. EJ stalks a gator who has been stealing his fish.

An eye-popping, reckless move puts a survivalist's challenge at risk.

Two survivalists confront sub-freezing temperatures in the swamp.

Days from the end of their 60-day challenge, the remaining survivalists join forces against the frigid swamp. Desperate for a bighug, all seven go on an epic group hunt. During extraction, a vessel takes on water and puts a pair at risk for hypothermia.