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.

After eating a balanced diet and having a partner to work well with in Yucatan, Alyssa felt fantastic during her Naked And Afraid recovery. Find out what good news she has to share from her time after the challenge!

Aaron's pretty confident that he won't tap out from the 21-day challenge. In this digital exclusive casting tape, he explains why other survivalists may not make it.

When you're surviving naked, insects and other small creatures see our survivalists as a future feast! Here are some highlights from Bares All.

As a wilderness EMT, Danielle tries to take care of Charlie's bloody gash. But his mindset won't let him accept the help.

One thing is for sure: survivalists should expect the unexpected. In this Bares All clip, watch how Kim did not expect to have worms and handled it.

Charlie and Danielle share different beliefs about what food they should and need to eat to survive. As their disagreement comes to a head, they learn to compromise.

Kacie may not be the most experienced survivalist on Naked And Afraid, but a childhood filled with camping trips has prepared her for the 21-day challenge.

Naked And Afraid survival partners Don and Holly meet for the first time naked in Namibia without inhibition.

Trenton and Jennifer are inserted high above the steep valley region of Udhampur. They have to acclimate to the new geography, and new sensations that come along with surviving naked and afraid.

In this digital exclusive casting tape, Matt explains that he has survival experience that just can't be taught.

The Marula tree is indigenous to parts of Southern and Western Africa. After Don's extensive research to prepare him for the challenge, he is excited to store up on calories from the fruit.

Karen believes that her outdoor experiences have helped prepare her for the 21-day Naked And Afraid challenge.

No matter the location or survivalist, the Naked And Afraid challenge presents its special digestive and bathroom challenges.

Although Kim contracted worms before her extraction, the biggest obstacle of her recovery was rebuilding trust with her young daughter upon return.

For many survivalists, singing or dancing was a way to lift spirits and get through the challenge.

On a stormy night, another storm brews between partners Jennifer and Trenton.