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; a large predator stalks one team; Bulent secures fire and chases a protein score.
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 repurposes debris to trap a protein source.
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.
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.
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.
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.
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.