Watch Naked and Afraid: Apocalypse

Days from the end, Teal's sudden tailspin threatens her challenge. Desperate for food, the remaining survivalists use scavenged wire to dredge the pond. With no rescue coming, they must escape the apocalyptic landscape to return to civilization.

At the last water source, an abandoned cage may be the only viable shelter. Teal and Frank both score bow wins. A second crocodile has Wes on edge.

Wes and Stee brave croc-filled waters to build a fish dam and get their first catch of the challenge. Teal and Waz use a mosquito net to catch six terrapins. A heat wave has Frank on the brink as medics assess if he can continue.

Stalked by black mambas, lions, and crocs, Wes eyes the exit. Teal's bow scores a big win. As an elephant closes in, Joe rigs an alarm from scavenged wire and shell casings. Steven and Frank's bid to turn sheet metal into a roof might end in disaster.

An unrelenting electrical storm pounds the wasteland for three straight days. Survivalists scavenge wreckage for roofing materials and gutters to stave off flooding. Barely protected inside a junked car, Alexa's challenge is at risk due to hypothermia.

Wes and Stee scavenge materials to take on their crocodile nemesis. Lions stalk Waz and Teal. A survivalist scores the first big-game kill of the challenge. A rogue elephant targets Joe. The wasteland forces two more to bow out.

Fueled by their fishing win, Waz and Teal scavenge the ruins to build shelter. Wes fights a territorial crocodile for control of a fishing spot. Amber battles an eye infection as camp chaos boils over. Two survivalists are forced to leave the challenge.

In an abandoned African wasteland, 12 battle-tested veterans scavenge ruins to survive. Camps turn old tires into shoes and use barbed wire as protection from aggressive lions. A rogue elephant forces Steven's camp to make shelter from junked cars.