On a gold streak, Dustin dives deeper than ever and uncovers the largest obstacle of his career. New recruit Scott finally gets the opportunity to prove himself in the water, but a rookie mistake could end his career just as it gets started.

Dustin's gamble of investing his life savings into these claims is pays off after Carlos removes a monster boulder and finds chunky nuggets. Fred and crew battle the Trifecta, and a game-changing discovery proves Fred's theory of the ancient waterfall.

Determined to add to his season's record-breaking gold haul, Dustin pushes his luck to the very edge, as a freak accident sends him hurtling out of control towards the 80 foot drop at McKinley falls.

Dustin calls on local legend "The Pirate" for help cracking a boulder blocking him from the richest ground of his life. After Fred is forced to put all diving on hold, Paul returns and they're on track to get gold for the first time this season.

Fred turns to his son Dustin for help when he uncovers a giant overhanging boulder at The Trifecta on the side wall that threatens to kill any diver below it.

The Dakota Boys are close to a huge gold cleanup; Ryan faces his worst fears as he dives deeper than ever into a crumbling, narrow 14-foot hole; Carlos finally hits bedrock at Rockfall Ravine and reveals that this dive site could pay out huge.

Dustin's crew is finally down to virgin ground but discovers their equipment is no match for the giant boulders at Rockfall Ravine, so Wes fabricates a new tool for their arsenal -- The Mammoth Claw.

With their richest site picked clean, Dustin and crew move upstream to "The Chute" a promising, yet dangerous site with rapids stronger than ever. Fred and crew rethink their operation and adapt the rock drag method to a vertical lift system.

Dustin’s crew make an exciting discovery that pushes them to test their limits. Fred’s crew is dangerously deep and under pressure to get down to bedrock tests them all.

An early winter storm turns McKinley Creek into a raging torrent. Unwilling to call it quits, Dustin and his crew prepare for their toughest battle yet. At the trifecta, Fred's worst fears come true as the walls of his dive hole come crashing down on him.

At his new dive site Dustin’s life is endangered after being overpowered by raging white water. After heavy rain, Fred’s crew has a deadly encounter.

Dustin risks the remainder of his season on an ambitious move upstream to raging waters in a quest to add to his record-breaking gold haul; after a brush with death, Fred must come up with a new plan before someone gets killed.

The Dakota Boys race against time and put their new crew members to the test to rebuild their mine sites and haul heavy equipment to the Trifecta and Rockfall Ravine. Their first dive is golden and promises a successful season.

Carlos, Dustin and James battle the fastest and most violent rapids they've ever dove in. They must engineer a way to slow the rapids down or risk being washed over the 80-foot waterfall. A faulty dredge valve on Fred's operation becomes explosive.

A late start to the season shortens their mining window and with record snowfall melt the crew faces the most dangerous conditions ever. Dustin picks up right where he left off at Rockfall Ravine, while Fred's future diving for gold lies in the balance.