Heroes fight to save a stranded vessel, and a mysterious 200-year-old shipwreck washes ashore.

Two veteran mariners battle winter storms on the North Atlantic, and a tugboat captain and his crew escort a massive warship into port.

The province's largest dry dock tackles a rare double docking of two massive ferries, and one veteran skipper finds success on the Grand Banks while another delivers goods to remote communities.

Ice experts in the air and on land monitor for icebergs and melting sea ice, and a remote community gets a crucial delivery.

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.

Driven by a severe crew shortage, the fleet relies on unproven greenhorns to salvage the season. Adam's teenage nephew faces the Gulf's hidden dangers in the dark.

While Dale struggles to run the family farm and his business, Gripp gets a call from his sister after a terrifying crash and races to help.

Paul Mackie and his team of gold mining experts travel to the Pilbara region in Western Australia to help an Indigenous family's gold mining operation save itself from imminent financial disaster.

Marcus hits his biggest gold of the season, the Dust Devils battle machine breakdowns and impure gold, and the Gold Timers' luck is finally on the up.

Jacqui and Andrew finally strike gold, the Poseidon Crew break ground on their colossal new lease, and Shane and Russell risk coming face to face with wild dogs that hunt the outback.

Irv imports an original-run short wheelbase Porsche 911 from the East coast of America. He needs to make it roadworthy while keeping its incredible sun-faded patina.

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.

Tensions spill over as the Poseidon Crew face a series of breakdowns, the Ferals are kicked off gold-rich ground before a new lease turns up a major haul, and the Gold Timers get lost in the outback.

The Poseidon Crew's research digs up an old treasure map that leads to the biggest nugget of the season; Marcus and Linden call in a mentor to help get them on gold in the first week of the season.

A rescue team races to save a seal pup and an ailing sea lion as scientists hunt what's killing the coast's vanishing grey whales.

Leigh outfoxes Donnie and Dennis and wins the rights to Matt and Damo's gold-rich land, and can Gold Coast socialites Richie and Kimberley get their new washplant to site without damaging it?

Cam gambles on an expensive new water cannon. A broken part on his sluice plant slows Karl's progress. Ken and Guillaume's first gold test is a dud.

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Jacqui and Andrew buy a quad bike to get to the site of an old gold rush in tropical Queensland, and Shane and Kate are falling further behind with more equipment failures in Western Australia.

Ken is forced to call in reinforcements when winter hits Moose Creek hard, Cam mines a treacherous ancient waterfall that could ruin his equipment, and Karl's mechanical skills are put to the test.

Gordon wants to invest the money from his melted gold stones into his own washing plant. Meanwhile, broken compressors and drills slow down large-scale miner James at 'Three Peaks'.

At Bristol County Jail, nearly half the cells have no locks, a design built for lower-level offenders. But rising gang populations and more violent inmates have changed the stakes.

The Poseidon Crew and Neville Perry's sons make their long-awaited return to German Gully, the Desert Diggers wade through mud for a payday, and Sheryl and Simon battle breakdowns to hit their target.

Huge floods and a mini tornado have almost paralysed Gemfields, but the district has been desperate for water for years, and a little destruction won't stop the miners from trying.