To be rescued, the remaining castaways must hike across jagged, volcanic rock and crumbling cliffs, build a large signal fire, and construct a raft from driftwood and debris. An explosive fight between Na'im and Patrick threatens extraction.

Bulent struggles with uninvited guests and scrambles to protect his huge meat win. A water migration tests Na'im, Kerra and Justin's raft -- and a mysterious fever puts their challenge at risk. The groups join forces to push north for extraction.

After an emotional reunion, Na'im vows to get Rachel to day 21. A group must migrate through a croc-infested swamp. Bulent finally comes nose-to-snout with the elusive pig he's been hunting. A survivalist is forced out of the challenge.

Medics intervene when Justin tries fruit known as the Little Apple of Death. A clash about fire sparks into a raging fight between Kerra, Na'im and Bulent. Andrew and Heather question Patrick's hunt for a saltwater croc. A team splinters into two groups.

Desperate and depleted, Heather, Andrew and Patrick scavenge debris to make fire. Candice secures a protein win. Bulent and Na'im butt heads when their pig snare fails and Kerra is caught in the middle. A survivalist is medically evacuated off the island.

Ravaged by bugs, Heather must move camp -- but with no map, the grueling trek puts Andrew's challenge at risk. Bulent works to trap a wild pig, but his Alpha approach frustrates his team. Candice tries to turn the pelican carcass into a new food source.

Bulent scores an armadillo with his bare hands, but Na'im struggles to process the win using a fan blade. Andrew and Heather try to make fire, but the only sparks come from their conflict. Candice's team re-purposes debris to trap a protein source.

Nine veterans are marooned on a bug-infested island with no tools or maps. They must scavenge wreckage to help them survive. Insect bites ravage all camps, and a large predator stalks one team. Bulent secures fire and chases a protein score.