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.

Manu shares a warning to anyone out there who thinks they can handle being Naked and Afraid. Considering she contracted a life-threatening case of dengue fever, you might want to heed her advice.

Manu cannot control her laughter due to the ridiculousness of her partner Russell climbing a tree in the nude. Days later, she was still laughing - watch to see why!

Get an update on Executive Producer Steve Rankin's recovery from a fer-de-lance snake bite, and hear why the survivalists still chose to go on with their challenge in Costa Rica despite Rankin's deadly bite.

Did the guys ever become - excited - when waking up in the morning next to their naked partners? Talk about awkward!

When you gotta go, you gotta go - even when you are stranded, naked and afraid with a group of strangers.

Is it cold out there? The Naked and Afraid survivalists talk about some major shrinkage issues during their challenges.

The survivalists prepare, cook, and eat snake meat in many of their Naked and Afraid challenges. Tune in to learn more about their snake snacks!

Watch some of the weirdest casting tapes for Naked and Afraid. If you think you have what it takes, fill out a casting form at discovery.com/survivenaked!

Meet Manu and Russell, one of two duos on the Naked and Afraid Double Jeopardy special.

Deep respect, admiration…and love? See what this pair of survivalists has to say about each other, and catch their full episode in the all-new season of Naked and Afraid!

Take a look at the extended sneak peek of the all-new season of Naked and Afraid, premiering Sunday, June 29 10/9c on Discovery!

Check out these crazy casting tapes and see what it really takes to win over the casting directors to become a survivalist on Naked and Afraid.

Meet Cassie and Forrest, one of two duos on the Naked and Afraid Double Jeopardy special.

Thirsty? Learn about drinking from water vines in the unforgiving Costa Rican jungle.

EJ puts together makeshift sandals to protect his and Kellie's feet from the thorny ground in the Tanzanian Serengeti.

Kellie takes a mud bath as she and EJ search for shade during their Tanzanian survival challenge.