Dave attempts to crack the old timers' code in the town of Marysville.

Dave uses his experience to decode 1,400 acres of Birdseye Mine.

Dave brings his crew to a hotspot along the banks of the Missouri River.

An old buddy offers Dave a stake in land the old timers missed.

Dave travels down into old abandoned tunnels at Miller Mountain Mine.

Dave hunts for riches left behind in a 50-year-old abandoned mine.

Dave takes part in a fire test to find gold deep in the Alaskan wilderness.

A Montana rancher finds a rare fossil and a Wyoming man uncovers a horn.

Clayton continues his excavation of a rare, carnivore on his Montana ranch.

Clayton prepares to transport a 20,000-pound carnivore fossil to the lab.

The Harris/Bolan clan chases poachers off their land.

Clayton hunts for quick finds while Mike searches for triceratops horns.

Clayton learns if his dino skeleton belongs to a T-Rex or a nanotyrannus.

The Dakota Boys arrive at McKinley Creek ready to get on the gold.

Todd Hoffman sends an ex-marine to keep an eye on the Dakota Boys.

A huge boulder crashes down on the mining site while Dustin is diving.