Jacqui and Andrew unearth the biggest nugget of their careers, the Ferals invest in a mobile sluice that could save their season, and the Poseidon Crew struggle with a waterlogged lease.

The Poseidon Crew clash over a risky return to the Slip Up lease, Shane and Russell suffer another mechanical breakdown, and heat and exhaustion puts the Ferals' hopes of reaching target in jeopardy.

Scotty transports a 30,000-dollar haystack but has a problem with his trailer, the town Jake is heading to is on fire, and will Des and his 158-tonne monster road train make it up a super-steep hill?

The Poseidon Crew are running out of time to find a 1000-ounce nugget, the Gold Retrievers attempt to escape dangerous summer heat, and the Goldtimers confront the extremes and uncover a massive haul.

Irv is a world-renowned expert in VW Sambas, so when an American collector turns to him with a bunch of rusted panels, and the dream of a showroom quality vehicle, there's only one man for the job.

The team update a 1977 Daimler Sovereign Coupe. They give it a modern makeover with upgrades to the suspension, ride-height, and colour. But a disaster in the paint booth puts the project in peril.

Irv finds the holy grail of VW: the Beetle. It's just miles from his garage, so he makes it his mission to breathe new life into this 75-year-old cable-break classic.

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.

Irv takes on the restoration of an Escort RS1600i from an owner who had to give it up due to ill health. It turns out to be a much bigger job than he imagines.

Disaster strikes the Gold Devils with just weeks left in their season, the Gold Retrievers put their gold dreams on the line, and Vince, Bibi and Murray take a big risk investing in new machinery.

The Gold Devils return to their Fair Lady lease in pursuit of their 1000-ounce target, and the Ferals face a standstill when their excavator is seized by rivals.

The Poseidon Crew battle to run two leases simultaneously in a bid to meet their 1000-ounce season target, and Alan and Salty brave uncharted waters and make a significant discovery.

A freak accident forces Jacqui and Andrew to call in help, Alan and Salty take a bold gamble for their final push of the season, and Shane and Kate dig up an explosive relic from the past.

The Poseidon Crew hope to pull in enough gold in the season's final week to keep the team together, the Gold Devils push their equipment to failure, and the Ferals battle through blistering heat.

The season is halfway through as Ken and Guillaume try to reverse their bad luck by moving, Bernie has to deal with mistakes made by his junior crew, and Karl's night crew starts to slow him down.

Winter threatens to shut down mining early, Guillaume considers retiring the frozen Bad Attitude for good, Karl's sluice box ices over and traps his gold, and Big Al and Hiro battle beavers.

Snow on Moose Creek makes for dangerous conditions and critical mistakes, Karl faces simultaneous breakdowns causing a shutdown, and Bernie's pay streak suddenly ends just as he loses a crew member.

Big Al moves his sluice plant to his last pit of pay dirt, Ken and Guillaume may have hit their mother lode, and Bernie's gear degrades and potentially ends his season prematurely.

Ken makes a dangerous fuel run with no diesel left, Karl ignores his dad's advice and risks a flood on their mine, and Big Al's final efforts may push his crew to their breaking point.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

An unusually low snowfall and a late freeze-up in the Arctic presents new challenges to the Alaskans. Travel on the treacherous trails through the wilderness becomes more of a risk.

Inside Washoe County Jail, a surge of arrests strains operations. The sheriff enforces strict control as deputies work to separate gangs. In the female unit, a pregnant inmate prepares to give birth.

As 'Dirt Dogs' Vern and Leon are forced to uproot their operation, 'Gold Gypsies' Chris and Greg face a huge decision and remote prospectors Henri and Kellie strike salt-lake gold.

Torrential rain threatens to drown out the season for the Dirt Dogs. Remote prospectors Henri and Kellie hit a hot streak while the Gold Gypsies strike a once-in-a-lifetime find.

The Dirt Dogs' comeback rests on a crucial make-or-break action. Chris and Greg surf a wave of reef gold, and Henri and Kellie risk life and limb to continue working a rich vein.