Kellie and Henri unleash a new piece of tech on a vast salt lake. And in a remote frontier town, a chance meeting could turn a crisis into a jackpot for lone wolf Rick Fishers.

On the verge of a huge payday, the Dirt Dogs face up to a possible disaster, while Ted and Lecky's mission to find a one-in-a million nugget turns into a manhunt.

Deep in Western Australia's legendary Goldfields, five hardcore teams of gold prospectors are risking their dreams and futures, in pursuit of the ultimate golden reward.

As bushland miners The Dirt Dogs encounter a possible find of a lifetime, Henri and Kellie battle brutal weather and each other. And the Gold Gypsies strike a deadly threat.

Deep in Western Australia's legendary Goldfields, five hardcore teams of gold prospectors are risking their dreams and futures, in pursuit of the ultimate golden reward.

Deep in Western Australia's legendary Goldfields, five hardcore teams of gold prospectors are risking their dreams and futures, in pursuit of the ultimate golden reward.

The Dirt Dogs take on the biggest gamble of their career, and the Gold Gypsies tear into an all-or-nothing final mission. Meanwhile Rick digs deep to save his season.

The Dirt Dogs go to Kalgoorlie to process the gold from their Heap Leach. Meanwhile, Ted and Lecky's daughter, model and jewellery designer Tyler, joins their hunt for pay dirt.

The Dirt Dogs hunt for an elusive gold reef and unearth a mother lode of calcrete-covered gold, while The Scrappers have their first weigh-in after eight months of painstaking effort.

One of the gold hunters unearths a monster nugget that dramatically transforms their season.

Vern and Marko reach a crisis point; Rick takes to the air in a crucial race to peg a new lease.

The Dirt Dogs are sabotaged after Marko's shocking departure, but they fight back with big tech and even bigger gold.

Scorching 45-degree desert heat pushes Rick Fishers to his limit; Alex risks facing more snakes in his hunt for gold-rich pay dirt.

The Dirt Dogs and Gold Gypsies fight back against the rising number of gold thieves, while the Scrappers' wash plant comes to a screaming halt.

The Mahoneys spend thousands on a loader to do a final push at their 8-Mile lease, while Alex is convinced there's big gold down deep at Relief Creek.

With the season just weeks away from ending, the Dirt Dogs are struggling to hunt out their final $350,000 in gold.

With the end of the season just days away, the Dirt Dogs need to deliver $233,000 in gold to reach their target; Alex faces a shock resignation.

The Dirt Dogs invest in a huge hard rock mining plant, while a new team from Victoria are hunting for million-dollar nuggets.

New crew the Victoria Diggers may have stumbled on a million-dollar motherlode, while the Scrappers are already at breaking point.

History is made as one team breaks all records by unearthing the biggest gold nugget ever found on television

The Gypsies are on gold before thieves raid their nearby lease; the Scrappers' struggles go from bad to worse

The Gypsies are on gold before thieves raid their nearby lease; the Scrappers’ struggles go from bad to worse

The Victoria Diggers' fight for survival could deliver a monster nugget, while the Gold Gypsies fend off deadly snakes as they strive to keep their gold dream alive.

The Gold Gypsies discover a meteorite that could be worth thousands, and the Mahoneys chase more big nuggets using Ted's grandfather's old treasure map.

The Mahoneys hunt for gold in one of the world's most uninhabited and remote regions, while the Victoria Diggers navigate a multi-million dollar joint venture.