Chris gets a call from a sick fisherman. Meanwhile, the warmer weather creates a large ice wall on the lake between the shore and the remaining nets, causing concern for all of the Ice Viking crews.

The Ferals are on the gold when a four-wheeler crash leaves them a man down, and the Poseidon Crew battle to overcome a catastrophic mechanical failure.

The Gold Devils pin their hopes on an exploration mission to a rugged outback lease, and flood waters wreck the Gold Retrievers' new plant.

Park's Towing race to recover five cars dumped down a steep ravine, Clayton's Towing recover a yacht stranded on an island, and North Coast Heavy Towing attempt to dislodge a bogged tipper.

Shane uses a clever bush fix to get himself out of a jam in the remote outback, and the Gold Retrievers find a gold-rich quartz vein that could hold the motherlode.

As the wet season looms, the bull catchers race to make money; unflappable Kurt finally meets an obstacle he can't sidestep when his buyer falls through, and Clarry is nearly ready for retirement.

As the gruelling lobster season enters its make-or-break final weeks, Kevin cripples his boat in a maze of tangled gear, and William relies on an older rookie deckhand seeking healing on the water.

After a brutal year of pain and pushing through, Dale pins his hopes on a life-changing surgery while Gripp steps up to carry the load.

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.

The Poseidon Crew track a gold-rich ancient riverbed, Jacqui and Andrew hunt in the extreme wilderness of Central Queensland, and Shane and Russell's new washplant could leave them high and dry.

The Gold Timers call in Rob's grandfather and unearth their biggest haul ever, Shane and Russell push their sluice to breaking point, and Marcus and Dale finally unearth a monster nugget.

Irv finds the holy grail of VW: the Beetle. It's just miles from his garage, so he makes it his mission to breathe new life into this 75-year-old cable-break classic.

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.

An undersized excavator forces Rob to consider quitting the Ferals, Marcus and Linden confront a rival prospector, and expert help pushes the Gold Timers closer to their dream.

The Dust Devils' critical water supply runs dry, Jacqui and Andrew unearth their biggest haul so far, and torrential rain could shut down the Poseidon Crew for weeks.

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

Todd and Brianna battle back-breaking work, gear failure, heat and dust; how will they juggle family life and grow their tiny sapphire business?

Frozen ground threatens Cam's season. Ken and Guillaume shut down their prospecting mission. Karl weighs in his mid-season gold.

Mel and Alex are forced to explore dangerous old mine shafts looking for a new source of gold in Western Australia, and the Heli Hunters race to stake a claim and finish their season.

Alan and Salty encounter bullets and crocodiles as they seek gold in the Cape York rainforest, the Brumbies face another breakdown, and the McGhies' hopes are crushed by multiple machine breakdowns.

In Germany, engineers battle groundwater, tight space and complex logistics to build Frankfurt Airport's Terminal 3 - a vast new mega hub designed to handle 19 million passengers a year.

Gordon is under massive time pressure. But a frustrated Sebastian stays away from work. Meanwhile, Stanley and Kristin fight their way to an abandoned mine, discovering promising signs of gold.

We delve into the audacious escapades of Gerald Blanchard, a master thief who executed high-profile heists, and witness an ingenious tunnel used by El Chapo for his dramatic escape.

On a muddy recovery job, Dale proves that size doesn't matter when it comes to getting the job done.

The Bushies are back and hope for a change of luck, the Richardsons return to an old claim to see if it's worth reopening, and Todd and Brianna divide and conquer to keep their business ticking over.