What secrets lie at the bottom of Harrison Lake? Adam and Kru trace a prospector's coin to a remote island with a deep history above and below water.

Roy's first-ever outback dirt road haul hits disaster, and Shelley faces high-pressure stakes hauling cattle for one of Sludge's most important clients.

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.

The Poseidon Crew battle challenging terrain in the mountains of High Country Victoria, and promising signs could lead the Gold Devils to a million-dollar pay day.

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.

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.

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.

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

The final week of the season: the Dust Devils' disastrous season goes from bad to worse, Shane and Russell battle the heat, and the Poseidon Crew unearth a nugget that catapults them to target.

The Poseidon Crew are poised to secure ground that could hold multi-million-dollar nuggets, Jacqui and Andrew venture into north Queensland, and the Ferals take a gamble on a remote island expedition.

Big Al moves his sluice plant to his last pit of pay dirt, Ken and Guillaume may have hit their mother lode, and Bernie's gear degrades and potentially ends his season prematurely.

Irv restores a golden supercar, a 1970s Lamborghini Espada, for a client in the Middle East. Hidden structural damage and spiralling engine issues threaten the entire project.

The Dirt Dogs' stalled 'Heap Leach' project is at crisis point, Rick has $9,000 left to reach a target, and the Scrappers are forced to retrieve gold from one of their leases before poachers steal it.

The Dirt Dogs' 'Heap Leach' plant is sabotaged, but the operation is vital to reaching their massive target. Rick needs just four ounces and the Mahoneys are confronted by unscrupulous competition.

As wildfires rage, Dale battles smoke, heat and steep mountain passes to help his friends... until the road fights back.

Cod's legacy looms as fishers, families and scientists fight to secure Newfoundland's fishing future.

Ken and Guillaume fight a flooding creek, Karl is still waiting to get his sluice set up, and Big Al goes after the 'smart' gold.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

As families celebrate Easter ashore, mysteriously empty traps spark fears of a high-seas robbery across the crab fleet. Captain Steven brings his five-year-old son out to brave the unforgiving Gulf.

The Poseidon Crew call in a trusted ally as time runs out, the Mackies detonate explosives to obliterate impenetrable rock, and Jacqui and Andrew gamble everything.

'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.

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.