When the hard hat heroes scramble to offload a huge shipment, the heavy-duty mechanics step in to help them pull off the mission.

Historic sea ice brings the harbours to a standstill as the heroes fight to keep the island running while making sure that everyone is safe.

Crane operators take advantage of the peak of the fishing season to launch a huge number of boats; this time of year is almost nightmarish for those in charge of keeping the shipping lanes clear.

A stalemate dispute over the world's largest fishery threatens the livelihoods of people.

The lobsters are moving closer to land - and every captain is right behind them - as Steven sets out with an impossible mission: reach his quota in time to surprise his son for his birthday.

A New Jersey neighbourhood is devastated by a factory explosion, a packed train crashes into a river in New Zealand, and a new state-of-the-art hospital in Liverpool in the UK is plagued by problems.

Mining buddies Donnie and Ronnie have an explosive break-up that threatens Donnie's dream of owning his own lease; at the 1870 mine, Richie builds a gold room to start sorting out fine gold.

The Poseidon Crew receive permits to mine their own ground and hit the motherlode, and the Goldtimers are pushed to their limits as Marcus and Linden return home and finally break their gold drought.

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.

A 1938 Buick brings out the best in Mike, a classic van delivers nothing but problems, and Mike and Avery hit the dance floor.

The season is halfway through as Ken and Guillaume try to reverse their bad luck by moving, Bernie has to deal with mistakes made by his junior crew, and Karl's night crew starts to slow him down.

The Poseidon Crew dodge raging bushfires, the Gold Gypsies set out on a dangerous night-time detecting mission, and Shane and Russell push their fragile wash plant to breaking point.

The Victoria Diggers' gold run dries up, Marcus and Linden suffer an injury that could end their trip, and the Dust Devils battle breakdowns to produce the biggest gold pour of the season so far.

A rescue pilot frees rehabilitated raptors, fishers hunt elusive rockfish, and a First Nation fights to bring its salmon home.

Matt and Damo weigh up the two offers they have received for their land at Scratchy Moo, and Donnie and Dennis strike new gold at Swiss Diggings but gold poachers attempt to raid their pit.

The season is halfway through as Ken and Guillaume try to reverse their bad luck by moving, Bernie has to deal with mistakes made by his junior crew, and Karl's night crew starts to slow him down.

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.

Ken rolls his only bulldozer, Karl's loader breaks down, and Big Al's prize excavator takes on a battle against nature when beavers threaten to shut his mining operation down.

At the start of the new season, the gold seekers in the rough north of Australia are under extreme pressure. The dry season offers perfect conditions for the treasure hunt, but there is not much time.

At Caddo Parish Correctional Center, staffing shortages leave deputies outnumbered. As incidents erupt across the jail, the Emergency Response Team races to restore control.

Shane and Russell chase lost gold on Mosquito Creek armed with new information; disaster strikes the Desert Diggers; Jacqui and Andrew push deeper into the Palmer River using a new off-road vehicle.

Anthony and Jodie finally install the ladder in their unused shaft and Matt and Amber start digging underground on their new claim; will their investment pay off, or have they bought a dud?

An early kick off to the winter fishing season on Lake Winnipeg as temperatures plunge and the Ice Viking fishing crews scramble to get onto the ice with their nets.