PJ's wife visits the mine and questions if the operation is worth the toll it takes on their family.

Tasmanian logging contractors the Bennett Brothers tackle forest tracks to move a huge tree winch, and a leaky fridge halts a urgent frozen food delivery by Woody.

Winter storms cripple the Gold Retrievers' new dryblower, wet paydirt forces Shane and Russell to shut down their plant, and the pressure to find gold could finally tear the Ferals apart.

The Poseidon Crew are forced to hunt Victoria's frozen high country, the Goldtimers use the last of their savings on big machinery, and Marcus, Linden and Dale dig deep to uncover gold-rich ground.

As the wet season looms, the bull catchers race to make money; unflappable Kurt finally meets an obstacle he can't sidestep when his buyer falls through, and Clarry is nearly ready for retirement.

Mike and Avery visit Avery's childhood home, a Rust Valley newcomer gets help rebuilding his dream, and Mike's '68 Chevelle rises from the dead.

A rare solar eclipse disrupts the catch, Steven's gear fails, Adam's crab chasing leaves him on fumes and rookie captain Kevin struggles through his first day behind the wheel.

Railways have overcome almost all nature can throw at them, from crossing the cyclone-prone Indian Ocean and travelling through an earthquake zone to carving through the cliffs of the Italian Riviera.

While on the search for billions of dollars in gold, historian Tanya uncovers a shocking new theory that flips the hunt to the east.

The Victoria Diggers struggle to hit targets, Shane and Russell's operation suffers storm damage, and the Dust Devils' operation grinds to a halt when their loader suffers hydraulic trouble.

The Poseidon Crew receive permits to mine their own ground and hit the motherlode, and the Goldtimers are pushed to their limits as Marcus and Linden return home and finally break their gold drought.

Falling behind schedule in the Camp Cut, Big Al pushes Hiro to his limits in a desperate attempt to start sluicing.

Irv restores a golden supercar, a 1970s Lamborghini Espada, for a client in the Middle East. Hidden structural damage and spiralling engine issues threaten the entire project.

In Western Australia's legendary Goldfields, three teams of hardcore gold prospectors risk their dreams and futures as they pursue the ultimate golden reward.

Mechanical problems and a high-stakes gamble threaten to derail the gold season for both the Dirt Dogs and the Gold Gypsies.

The Glovers fight harsh winter conditions on the highway, and a rash of breakdowns and a collision on the block for Craig threaten to delay his job.

The race is on to finish crab and scallop fishing with lobster season on the horizon, Cody's crew hauls record catches, and William pushes both his crew and Moonship to breaking point.

Bernie gets shut down at Little Blanche when he discovers the old timers took more than he bargained for.

The Ferals lose a team member in the unforgiving outback, and Shane gets an attractive offer that could break up his partnership with Russell.

Jacqui and Andrews' big gold dreams are stalled by communication issues, and the Poseidon Crew battle wet weather to unearth a monster pay day.

Irv restores a golden supercar, a 1970s Lamborghini Espada, for a client in the Middle East. Hidden structural damage and spiralling engine issues threaten the entire project.

The team explore a 100-year-old mining claim using cutting-edge technology, and a family connection leads Tanya one step closer to the enigmatic Lasseter.

Michal Materla is fast becoming one of the best MMA fighters in Poland. But he loses the championship belt, and then he loses his freedom. Counter-terrorists entered his house, and Michal is arrested.

The Mine SOS team have just six days to install a full-scale hard rock mining operation and deliver a potentially life-changing payday for hard rock rookies Nathan Malatesta and Steve Ogilvie.

Six strangers from across the US set out on the mission of a lifetime to Greenland's brutal landscape; do they have what it takes to overcome obstacles before winter closes in and shuts them down?

The Victoria Diggers suspect that all the gold from the mine shafts they're excavating has already been cleaned out, and Jake's new 'vat leaching' plant delivers a 100-ounce motherlode.

As the end of the season approaches, the Scrappers are over $185,000 short of target, the Dirt Dogs' season is on the ropes, and the Victoria Diggers' job becomes dangerous as a heavy storm strikes.