Sarah from the "Lost At Sea" challenge in Exumas checks in from her sailboat in Hawaii. Still positive and upbeat, Sarah continues to adventure the world whether it be by land of sea.

During Kim's casting tape for Naked And Afraid, she describes what her ideal partner would be to balance her personality during the 21 Day challenge.

Keith Busch and Alana Barfield meet for the first time, naked on a remote Fijian island. Will they have what it takes to survive naked and afraid for 21 days?

Forget pirates and voodoo curses, the scariest thing about Louisiana might just be the mosquitos. Will Michelle be able to make it through 21 days of biting torture?

Tensions flare as resources are put towards building chairs instead of finding food.

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

The nights are long and cold during the 21-Day survival challenge. One of the best ways to combat the elements is to snuggle, but not all partners are comfortable.

Five days into the Naked And Afraid challenge, Julio claims he has no hunger. At the same time, Tawny experiences hunger pains and continues to hunt for the team.

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

Kristin is inspired by all the uses, both practical and pretty, she’ll have when she masters the art of taking fibers to make cordage.

Vincent and Sabrina meet for the first time, naked in the Bolivian jungle as they begin their 21 day survival challenge.

Sabrina turns to her new "friend" Mushroom Man in her partner's absence. A true castaway moment.

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

After a rough challenge, Duck does not recommend sleeping naked in the jungle.

Fire ants, mosquitoes, ticks, oh my! One common experience for many of the survivalists is being eaten alive by tiny critters.

Gary's time spent around the world in extreme conditions has prepared him for the Naked And Afraid challenge. Learn more about his past from his casting tape.