Luke and Lindsey meet on day 1 of their Naked and Afraid survival challenge. Will they have what it takes to survive?

This is real. This is legit. And these castaways are running on empty.

Zack makes good use of his selfie camera and lets out a goofy side during his last week of the survival challenge!

The pressure of building a shelter is too much for these strong-willed survivalists, but trust and unity are essential in order to make it to the end.

Billy demonstrates how to transform a broken piece of glass into a lethal spear head, creating a weapon better-suited for hunting than a simple wooden spear.

From parrot heads to turtle testicles, the survivalists have eaten it all. Relive the craziest eating moments from Naked and Afraid history.

Billy and Ky meet each other for the first time, just before their 21-day naked survival challenge in the swamps of Louisiana.

Using cordage to make nets can make all kinds of useful items, like a hammock or clothing. Watch Paolo learn the ropes!

Billy and Ky are having a rough time between sleep deprivation, poor weather and relentless mosquitos, but Ky is getting tired of Billy's whining.

Desperate for protein a few days into the Naked And Afraid challenge, Jake resorts to swallowing grubs whole.

Angela and Darrin sit down with Naked And Afraid Executive Producer Joseph Boyle to discuss 21 days of clashing personalities, animal invasions, and more.

Learn step-by-step how to make a loincloth from scratch using leftover nutria hide.

Thorns all around make a jungle walk hellish. But with handcrafted cord survival sandals, Darrin and Angela can venture into the jungle to find necessary food.

Get a sneak peek of the Naked and Afraid finale as Alison Teal shows off her MacGyver skills - crafting clothing, baskets and more from her jungle resources.

Time for a hatchet haircut! Lindsey sacrifices her hair as cordage for a bow drill when she and her partner Luke become desperate for fire.

Kim and Gary reflect on their 21 Day challenge in Panama. Watch as they divulge their impressions of each other, toughest moments, and whether or not they'd consider taking on the challenge again.