Freddy and Juan showcase a never-before-seen "Lost Rescue," a situation that pushed the pros to their limit and beyond and give new info into their most challenging rescues yet.

Juan finds himself in an impossible situation with two Montana soldiers desperate to find enough gold to retire from the military. But with the winter freeze just days away, he calls in critical help from another Gold Rush legend.

In his last roll-of-the-dice, a struggling Oregon miner brings in Freddy and Juan to double his gold, which will convince best friend Terry to invest in his Oregon mine. The duo proposes a radical fix, but they may have bitten off more than they can chew.

A British Columbia family sold everything to purchase a 150-acre gold-rich property to mine and homestead. But as their families grow, their gold production does not. Shutdowns and broken equipment send Freddy and Juan's plans off track, forcing all-new ingenuity.

In British Colombia, the Paradis brothers left the oil fields to follow their mining dream 12 years ago, but now they can barely find gold. Juan rushes to modify the wash plant to save their dream while Freddy hunts for completely new ground.

Mining struggles threaten to destroy the deep bond of two mining brothers recently reunited in Montana. Finding a mysterious lack of gold in gold country, Freddy and Juan must successfully execute a high-stakes treasure hunt.

A 17-year-old mining prodigy, his father and grandfather wrestle with wintry weather to get their season underway in central Alaska. With another snowstorm brewing on the horizon, Freddy and Juan race to complete fixes before it's too late.

A trio of young Idaho miners struggles to find enough gold; to save them, Freddy and Juan bring new ingenuity to keep their mine alive; Freddy must identify a heavy, mysterious material he's never seen before, hindering their clean-ups.

Married Montana miners dream of building a gold mining dynasty on their nugget-rich claim. But the valley's patchy pay and a critical failure at the wash plant lead to Freddy and Juan facing their first-ever failed rescue.

A "one-man band" British Columbia miner needs Freddy and Juan to triple his gold to avoid ruin. But once the rescue begins, it quickly becomes too much work for a solo operation -- meaning that the miner's reluctant wife must learn to use heavy machinery.

Freddy and Juan face the challenging rescue of father-and-son miners on the brink. But what starts as a water situation leads Freddy to discover an even bigger issue: their ground may contain no gold at all.

A Nevada miner stages a last-ditch mining intervention to save his stubborn mine boss's 30-year-old mine. But it won't be easy as they race to convert the rickety old plant into a new fine gold super sluice.

It's the start of the new mining season, and Juan joins Freddy at his Colorado workshop to reflect on their most memorable rescues. The duo shows never-before-seen footage as they check in with miners to hear their successes.