Freddy and Juan deliver a mining masterclass, revealing their unique way of solving mechanical and historical puzzles. They revisit their most ingenious fixes and show how they approach problem-solving at every part of the mining process.

In California, Freddy and Juan rescue their first-ever hard rock operation. As stakes heat up with big fixes, Freddy makes a million-dollar discovery.

Under the threat of severe thunderstorms and floods during monsoon season in Arizona, Freddy and Juan must not only fix the group of friends' operation, but also race to recover enough gold to stop the investor from pulling out.

An Oregon miner calls Freddy and Juan to help save his mine to pass it on to his greenhorn son. They give the son valuable know-how but discover the property has been completely mined out. It becomes an all-out prospecting hunt to save their dream.

Freddy and Juan find a group of rookie miners in British Columbia inspired by what they saw on TV. The guys bring an old wash plant back to life, but things take a turn when a fire breaks out on the mountain.

Under the threat of severe thunderstorms and floods during monsoon season in Arizona, Freddy and Juan must not only fix the group of friends' operation but also race to recover enough gold to stop the investor from pulling out.

Freddy and Juan must revive a failing 50-year-old wash plant in Montana's gold-filled mountains, where a mining family must not only turn around the gold mine but also turn a profit to save their aviation business.

In Arizona, a scientist turned miner gambles his retirement to secure a legacy for his son. Against logic, Freddy and Juan must turn up the heat to fix the miner's innovative, self-designed "dry washer" to save the mine.

Freddy and Juan fly to an urgent SOS from a former Marine's mine in North Carolina. Inherited from his war buddy, the miner's dated operation will be the guys' biggest challenge without using any of their equipment.

Freddy and Juan rescue a British Columbia miner on his final season without a miracle. They overhaul his operation and search for new ground, leading to one of the most shocking endings yet.

Freddy and Juan face a failing gold mine in the Arizona Desert, run by a nephew and his uncle living on the claim. With their money exhausted, the guys devise an ingenious cost-cutting system with their first-ever solar-powered operation.

The fate of a rookie mountain miner lies in the balance after he sinks his life savings into a British Columbia placer claim. With fine gold proving tricky to capture, Freddy and Juan must develop all-new ideas to boost recovery.

Freddy and Juan reflect on the high-stakes rescues of miners striving to establish a legacy for their families. They check in with them, show exclusive footage and get a surprise visit from some unexpected guests.