In desperate need of protein, Fernando attempts to catch a fish with his bare hands.

Cass and Shannon meet for the first time - naked in Belize - as they begin their 21-day survival challenge.

Cass and Shannon run across an ancient cave system during their 21-day survival challenge in Belize.

Will Jeff stray from his deep religious beliefs in order to stay warm at night, or will he and Eva continue to sleep separately in the cave of black widows?

Vincent's frustrations with Sabrina begin to boil over. Will the pair make it through 21 days together naked and afraid in Bolivia?

Fernando Calderon and Samantha Pearson meet for the first time - naked - in Malaysia.

Water is scarce and the hot sun makes energy levels difficult to maintain.

The mosquitoes in the Amazon jungle are relentless. AK and Tyler have bug bites everywhere - and nakedness takes its toll.

Leeches invade the private parts of these two Naked and Afraid survivalists in Malaysia.

Keith goes after a deadly sea snake even though Alana thinks it is a completely unnecessary risk.

Desperate for drinkable water, Keith and Alana attempt to purify water using hot rocks.

Jeff and Eva arrive in Madagascar and strip down for their 21-day naked survival challenge.

Jeff has a personal vendetta against a lizard in Madagascar. When he finally captures it, what he does next will shock you.

On the first night of their 21-day survival challenge, the castaways are pummeled with rain, soaking them to the core.

The castaways spot a snake under a rock. Will it be their dinner, or will they be its next prey?

While squishing through the muddy jungle, a naked castaway spots a snake and needs her partner's aid.

If you think you've got what it takes to survive Naked and Afraid like Adam, #ShowUsWhatYouGot!

Watch as our naked duo - Shane and Kim - brave the heavy downpour and attempt to avoid hypothermia in the Costa Rican jungle.

Zack and Afften don't hesitate to strip down for the first time in Guyana. Now that they've met, they're ready to take on the 21-Day challenge.

At risk for hypothermia, Greg and Cassie do everything they can to get fire while surviving in Canada.

Julie says she feels no shame for being the only contestant to have quit the challenge. Watch to hear why.

Find out why professional surfer, Anastasia Ashley, and Youtuber, Cory Williams, have decided to take a break from their successful careers and embark on the Naked and Afraid challenge.

Puma recounts why they had to pull him from the challenge, what happened in the hospital, and some of his biggest regrets.

Think you’ve been #NakedAndAfraid? Sure, you could run out of toilet paper at the worst time... but that’s nothing compared to the Naked And Afraid challenge!

Surrounded by venomous black widows and scorpions - could you keep calm?

In Cayo Venado, the source of water was plentiful, but it was far and full of debris. Robin tried to use leaves and roots to concoct tea, but it ended up tasting worse.

Kim and Shane reflect on the shelter fire after their only protection from the elements goes up in flames.

Shane and Kim meet each other for the first time - naked - in the jungle.

Boo boo in the jungle? Grab some banana leaves and make yourself a band-aid!

Shelter is one of the basic needs during the Naked And Afraid survival challenge. Paolo learns how to construct a basic shelter to fit two people.

Puma and Julie meet each other for the first time, just before they embark on their 21 day naked survival challenge in Borneo.

Puma Cabra demonstrates how to construct and use a spring trap to catch a wild boar.