Duane decides that the flooded cave is too dangerous to dive into again, forcing the team to explore new access points to the underground cavern system. But something lurking in the darkness forces everyone to reevaluate their safety.
While searching unexplored areas of the ranch for an alternate entrance to the cavern system, the team discovers mysterious ancient markings on a cliffside and a mining shaft dug deep into the mountain that could lead them right to the gold.
Duane employs ground-penetrating radar to scan the land near a potential drill site, leading to a mysterious finding. Trespassers prompt Charlie to increase security on the ranch with a camera system -- capturing a frightening sight in the dead of night.
Dave and Cody drop into a Panama mountain jungle with only a poncho, a jar, and a lighter. Cody has an ingenious idea to ignite a fire using a jar lid. Later, they make a rope from vines to repel down a cliff, but Dave slips as he makes his descent.
Dave and Cody portray hikers lost on the Argentinian island of Tierra Del Fuego. The duo tests out a dangerous first-aid method using black powder from Dave's antique gun. Later, they risk hypothermia after deciding to cross a frigid glacial river.
Dave and Cody attempt to survive in Baja, Mexico's steamy salt flats, with little water between them. They finally come across a wooded area but argue about where to settle. Later, Cody builds a rabbit trap while Dave tries to make a fire using the sun.
Dave and Cody portray shipwreck survivors adrift on the Pacific Ocean. The rough water makes Cody seasick, putting him at risk for dehydration, but the guys soon find land on a deserted island. Dave searches for tinder while Cody hunts for a water source.
Dave and Cody demonstrate how to get back to civilization after surviving an avalanche in Wyoming's snow-covered Rocky Mountains. The duo builds a snow cave to save time. The next day, the team uses a parachute cord to climb down a steep mountainside.
Rick pivots to chase a vein of gold-rich paydirt that’s bankrupted other Keno miners. Parker heads to Alaska to prospect, leaving Mitch with a difficult decision to make at the Airstrip. Tony targets white channel paydirt to turn his season around.