PJ and Andy scramble to produce big gold after their main investor gives them an ultimatum.

Husband-and-wife truckers Nick and Jo recover a 70-year-old war plane, and a delayed flight to an outback town threatens to leave a mobile heart clinic without a doctor.

The Goldtimers gamble their last $6,000, Brad and Chris get expert advice that lands them some gold, and the Ferals face a killer snake.

The Poseidon Crew hunt a remote mountain pass, a gold drought puts huge pressure on Jacqui and Andrew, Levi and Bridget are left to hunt alone, and the Ferals hunt in the extreme Pilbara region.

Record cattle prices and a wet season have turned the outback into a gold mine for bull catchers; husband-and-wife team Liz and Willie Cook are expanding their empire, but with ever-increasing debt.

Mike's crew builds a 1969 El Camino to compete in a full-contact 'Hit to Pass' race against their biggest rival who plays by his own rules.

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.

We investigate incredible engineering breakthroughs; from mighty-powered steam trains and super-sonic rocket sleds to trains that seemingly fly above their guideways.

Donnie gets unceremoniously terminated by mine manager Dan at the 1870 mine, and Scratchy Moo owners Matt and Damo have a new opportunity to make some quick cash.

Gold thieves steal a fortune in gold from the Dust Devils, Shane and Russell hunt under an old caravan, and Marcus and Linden's lucky streak continues.

The Dust Devils are poised to smash the biggest season tally in 'Aussie Gold Hunters' history, the Goldtimers finally hit paydirt, and the Gold Gypsies' gold dream could finally be over.

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

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.

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.

Wagga Truck Towing execute a difficult crane salvage in the Turros river, Clayton's Towing salvage an excavator, and Truckworks fight a battle against eight massive mining trucks.

Whale rescuers, Coast Guard divers, and clean-up crews race the tides to protect BC's 27,000 km of coast from ghost gear and plastic waste.

Nika's brother quits, leaving her and Chris in the lurch at the end of the season.

An armed trespasser threatens the Gold Devils' exploration mission, and the Ferals uncover the biggest gold nugget of their mining careers.

The new team of Alan and Salty take the plunge in search of underwater nuggets, and the Ferals hit a rich patch but are forced to chase away thieves.

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.

In Greece, engineers battle earthquakes, unstable ground and coastal winds to build the country's first true skyscraper on the shores of the Mediterranean.

Olivia checks out the ever-expanding world of cam girls, female models making a fortune.

The miners realise that Greenland's harsh environment is a monumental challenge; with their equipment not good enough and finding nothing but rocks, Ray begins to wonder if he's done the right thing.

The Dirt Dogs' massive dry blower shuts down due to extreme 50-degree Celsius temperatures and the Mahoneys and Gold Gypsies take a last-minute gamble that delivers big gold.

Neville and Mick's final hunt of the season is set to deliver another monster nugget; Dirt Dogs' Jake secures a last-minute deal; Scrapper Alex pays the ultimate price for gambling his life savings.