Murder in the 21st

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.

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.

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. Fred puts greenhorn Scott to the test.

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 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. But tensions run high once Dustin takes control of Fred's operation.

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-feet hole. Carlos finally hits bedrock at Rockfall Ravine and reveals that this dive site could pay out huge.

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.

At his new dive site, Dustin is overpowered by the raging whitewater, leaving his life in his crew's hands; after heavy rain, Fred's crew fights zero visibility and has a deadly encounter 14 feet underwater.

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 in their 20-foot dive hole.

Dustin's crew return to the deadly waters of The Chute and an exciting discovery ignites the crew to push past their limits. Fred's crew is dangerously deep at The Trifecta -- and the 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.

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.

In McKinley Creek, Fred and Dustin Hurt split up into two separate teams for a better chance at striking it rich; with new technique and ingenuity The Dakota boys finish their season with a record haul.

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.

The Dakota boys have walked a fine line between bravery and insanity trying to strike it rich for four years now; creating ingenious bush fixes to mine gold in the most dangerous way possible; diving in freezing whitewater rapids.