Mining legend Neville Perry returns to the legendary German Gully with unfinished business, and outback adventure team Salty and Alan head to the world's biggest monocline in search of gold.

A tragic injury forces Ethan West to step up and run the Poseidon Crew on his own, and Jacqui and Andrew face dangerous wildlife as they push deeper into the Palmer jungle than ever before.

Justin and Chloe fly choppers to detect gold in the outback in Western Australia, and new team The Brumbies forms when Kat loses her office job and joins her prospecting partner Brett.

The Poseidon Crew are plagued with accidents and their aftermath in Victoria, and new team the Heli Hunters come face-to-face with the dangers of flying choppers.

Jacqui and Andrew blaze a trail into a corner of Fish Creek but a washout threatens to stop their 40-tonne bulldozer in its tracks, and the Gold Devils roll the dice on a costly move to new ground.

Karl races to get 100 ounces in the first week, Ken weighs the cost of an eager but careless hand who keeps breaking equipment, and Big Al has to replace equipment without a big payday.

Ken sinks big money to dig out a narrow cut, new miner Cam's big payday is threatened by fire, and Karl's experienced but unreliable operator forces his hand.

Ken must choose between paying his crew and his debtors; Big Al gets shut down by equipment breakdowns; Dennis has to scrape $10,000 out of hostile ground to replace a part or face permanent shutdown.

Ken fights a double mutiny when his plant and a crew member go rogue, Cam's veteran welder is struck down and airlifted to hospital, and a bear forces Karl's crew to gun for their lives.

Karl fights permafrost on his cut, Ken's wife visits to discover that he is on the verge of going broke, and Big Al's excavator gets into trouble.

As the frozen landscape of the Arctic melts away, the Alaskans get to work. They take advantage by heading out to hunt and securing their camps to protect them from flooding.

During spring, Alaskans take advantage of the daylight to complete tasks that are impossible in the winter. They complete landscaping projects, harvest fur, and explore of the Arctic wilderness.

Inside Clayton County Jail, an overcrowded, deteriorating facility, daily life is shaped by violence, contraband, and infestations that test every housing unit.

After missing out on last season's gold target, miners Chris and Greg Clark decide to go for broke or go broke, but a high-risk deal could land them in deep trouble as they receive harrowing news.

After starting their season in red-hot form, remote prospectors Henri and Kellie take to Lake Cowan armed with a new piece of technology, but their plans to unearth a fortune face a severe test.

After tracking down a rare gold reef formation, the Dirt Dogs look set to turn a major find into a massive one, but as hopes of a vast gold tally rise, troubles throw their season's plans into chaos.