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The Bering Sea battle intensifies as Shawn bets big on a new discovery. The Kellys are forced to find new ground and Emily nearly boils a diver alive.

A robbery at the Gold Retrievers' camp puts more pressure on Chris and Brad's partnership. Marcus and Linden finally hit a rich patch of nuggets.

Fisherman and adventurer, Jeremy Wade, travels to western Australia to discover what is wiping out many of the fish in Australia's Fitzroy River. What will he find.

Sig and Mandy rush to re-join the fray ahead of a fast-moving ice edge. On the Cornelia Marie Josh and Casey's race to save their pots comes at a heavy cost.

A wound side-lines Wild Bill's new rail man and injuries on the Time Bandit take out two crew. Josh and Casey apply frontier medicine to a bleeding deck boss.

As injuries pile up, the team push deeper into the Island in search of the Treasure of the Trinity, but a trail of clues leads to confrontation.

Josh treks the Inca Trail through the Andes and into the Peruvian Amazon in search of a mythical city of gold. His journey takes a detour to the ruins of Machu Picchu.

Josh dives into the Lajas Reef in search of the treasure of legendary pirate Henry Morgan. His journey takes him to a modern marvel, the Panama Canal.

The Raneys find a Montana homestead struggling through food, predator and power problems. Marty and Matt enlist a community of firefighters to help.

The Tunnel Rats risk their lives to get a massive digger under the ground. Meanwhile, the Blacklighters are amazed to unearth their largest piece of opal.

The Bushmen's new worker faces a dangerous first day on the job. The Tarantos' overworked excavator grinds to a halt, and the Cheals are hit with more breakdowns.

On the Blue grounds, a captain's bet has the boats jockeying for position, while on the Red grounds, a returning veteran proves his worth.

The Bering Sea exposes soft spots and weak links in each crew. While the skippers wonder which deckhands have the right stuff, the Time Bandit says goodbye to a crewmate.

The team journeys to Okinawa, Japan to investigate reports of possessions by the spirits of people who died in the bloody battles of World War II.

Josh travels to India in search of Dwarka, a mythical kingdom swallowed by the ocean. He dives into the Arabian Sea to visit a dig site that could rewrite history.

Neville and Mick's final hunt of the season is set to deliver another monster nugget. And, Scrappers boss, Alex, pays the ultimate price for gambling his life savings.

Sparks don't fly deep in the Panamanian jungle, an ex-cop and a self-described wild child clash over cuddling- before the challenge overwhelms one of them.

After a typhoon scatters debris through a Philippine forest, a stay-at-home mum and stubborn trucker combat sickness and no food to survive.

The crew focus on salvaging exterior items from the sporting goods shop in Largo, Maryland. Later, they repurpose a box of old farm equipment.

The crew salvage items from a mansion in Livingston, New Jersey. This historic home challenges the team with unusual design nuances and well-built features.

Shawn works overtime to cover for his exhausted crew. Kris is blindsided by the loss of his lead diver. Meanwhile, Emily jumps in to prevent a fuel spill.

Winter winds force the captains to reassess risk and reward. Shawn's mega-barge extraction worsens, and Ken pushes the Myrtle to the limit on a five-day run.

Jacqui and Andrew feel the pressure as they battle hard rock ground that could ruin their latest deal. Plus, Shane and Russell search an ancient mine.

Jeremy heads to Australia to investigate an underwater attack. Could it be the work of a giant fresh water predator that many believed to be extinct.

As canneries unexpectedly change delivery rules, captains must race to get to the front of the line. Jake risks a daring entry into St. Paul harbour.

Captains scramble to meet an expanded quota in the path of a violent storm system. A breakdown on the Wizard puts Monte in debt to the Time Bandit.

A dangerous run-in leads the team to an astounding new clue, but a communications breakdown leaves them in the dark about an approaching storm.

Josh scours the Virginia backcountry in search of the legendary Thomas Beale treasure. With encrypted codes hiding its whereabouts, can he solve the mysterious puzzle.

Josh Gates travels to the UK and Norway to unlock the secrets of a mystical crystal used by the Vikings. Before testing it, he explores a crypt in a Nordic church.

The Raneys rescue a single-father homesteader facing threats of rockslides and bears in a Montana box canyon. Marty and Misty face an uphill battle.

The Bishop invests in a massive new claim, but he has no money left over for equipment. Meanwhile, the Tunnel Rats risk electrocution as they hunt for crystal opal.

The Misfits search for a new claim in Andamooka's dangerous opal fields. With no working machinery, the Opal Whisperers put their hopes into a bucket of Yowah Nuts.

Halfway through the King crab gauntlet, the crews must dig deep to get over the midseason hump. The skippers give their youngest deckhands a choice: step up or step off.

Both man and machine are showing signs of wear. The Ramblin' Rose struggles with engine failures, while The Wizard's greenhorn grapples with doubts.

An up-close look at the North West Ambulance Service, from the control room to the paramedics. When emergency strikes, they have just eight minutes to respond.

An up-close look at the North West Ambulance Service, from the control room to the paramedics. When emergency strikes, they have just eight minutes to respond.