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.

Certified clean freak Brownie is covered in slop trying to load up hundreds of dirty cattle onto his road train, and Jake hits a deep crack in a dirt road.

Ryan collapses in a heatwave before the Ferals uncover a massive haul of gold, the Poseidon Crew's site is swamped after a brutal storm, and Shane and Russell uncover the biggest nugget of the season.

New recruit Sherl hopes to restore faith with his bosses on Team Cook, and Clarry's Indigenous clients dream of building a new life on their ancestral lands using proceeds from caught bulls.

The captains fight to stay ahead of the weather as Adam - who is stretched thin after weeks of running two fisheries - finally hits his crab quota but then runs into trouble in dangerous shoal waters.

Tragedy strikes in Puerto Rico as an explosion takes down a popular shoe shop, and an earthquake in California reveals a flaw that could put dozens of skyscrapers at risk.

Donnie hosts a live online auction to sell off the gold he's found at Swiss Diggings. He'll use the money to part-fund the land deal he's been offered. T. Richie may need surgery for his broken hand.

The Poseidon Crew dig for gold in century-old mine shafts, the Gold Gypsies struggle with an excavator breakdown, and the Goldtimers take a gamble on a new lease.

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.

Mike looks for redemption at a demolition derby that Avery enters a car of his own at, and Mike also restores a 1965 GMC van with an emotional past.

Guillaume tries to move the Beast, Ken contends with a bigger challenge - a visit from his wife - Karl is set back by one issue after another, and Al works around the clock to fix faulty machinery.

The Goldtimers hire a 7-tonne loader in a bid to end their gold drought, the Dust Devils risk running out of water, and Marcus disappears while clifftop detecting.

The Poseidon Crew continue their hunt for bush gold, the Gold Gypsies face one of the biggest decisions of their career, and the Victoria Diggers's perseverance could finally pay off.

Captained by Bruce, the Wildcard crew targets 45 tonnes of mackerel in four months; bad weather, engine trouble and sharks threaten their season, but a lucky streak might just save the day.

Paul's team deal with hardship and heartbreak as they help up-and-coming prospector Jarrod Crosbie; Jarrod is trying to pursue his dream of abandoning the city to become a full-blown prospector.

Guillaume tries to move the Beast, Ken contends with a bigger challenge - a visit from his wife - Karl is set back by one issue after another, and Al works around the clock to fix faulty machinery.

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.

Jacqui and Andrew explore crocodile-infested waters in search of nuggets, the Wanderers secure new ground, and the Desert Diggers fire up their one-of-a-kind dry blower The Beast.

The season is nearly over and all the teams are racing to hit their $500,000 gold targets; Damo and Matt are the goldfield's frontrunners, but they're being plagued by 11th-hour machinery breakdowns.

'Brace! Brace! Brace!' is the in-flight announcement no passenger ever wants to hear; this episode features caught on camera footage of what it's like to be involved in emergency landings.

A new member joins the expedition as wild weather strikes and risks the team getting stuck for weeks.

Michael and Cherie are determined to make the most of their surface claim while conditions are good, and Ray and Paul head underground in the hope of finding a green sapphire.

In their final week, the Wildcard crew is more than two tonnes short of their 65-tonne goal; with sharks circling at Cape Carnage, they fight for their last chance at a killer catch.