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The buyers have travelled to Allentown in search of old money. Items up for grabs today include rare Civil War-era objects from Gettysburg.

Vintage advertising pits the buyers against each other in Knoxville, where Sally spends big to win a dinosaur. Meanwhile, Billy's attempt at sabotage backfires.

High summer temperatures cause the miners to find new strategies. Shawn fights a legal battle, while Emily and the Kellys look to expand their operations.

As summer kicks in, Ken and the Myrtle Irene get stuck in the mud. The Kellys are forced to bail out and Shawn gets word on the fate of the Christine Rose.

The Poseidon Crew unearth two monster nuggets. The Gold Timers battle extreme heat and millions of flies as they desperately try to find gold.

Jeremy explores an incredible underwater discovery in the Arctic. Plus, he reveals details of a high-speed chase between a narco sub and the US Coast Guard.

Ship Of Iron, Men Of Steel. With only three weeks left to crab, the fleet prepares to make the final push to wrap up their seasons. But which of the crews will have fared better.

After enduring months of mechanical breakdowns, sleepless grinds, and infighting, the fleet is starting to crack, leading to crews taking unnecessary risks.

Experts investigate reports of a secret alien base deep inside Alaska's highest mountain. Video evidence suggests extra-terrestrial activity in Fairbanks.

Josh Gates investigates the fall of the remarkable Mayan empire, unearthing human skulls and ancient sacrificial altars underneath the jungles and ruins of Mexico.

Investigating giant geoglyphs drawn into the earth by ancient Nazca tribes, Josh Gates flies to Peru to study newly-found lines and joins a psychedelic ritual.

In a rescue first, the Raneys arrive at a Washington State homestead and find the couple's cabin recently collapsed with winter weeks away.

It's the last chance for the Rookies' partnership. Meanwhile, the Cooke brothers fight busted hoses and breakdowns in their quest to strike it rich.

Rookie Justin struggles to get his 20-tonne excavator across an extremely busy highway. Plus, Opal Queen Kelly tackles a new challenge with a new partner.

With Mandy alone at the helm, a freak accident threatens the Northwestern crew. And, Harley's launcher snaps at the worst possible moment.

In the biggest storm of the season, Jake faces a life and death decision. Sig and Mandy haul through angry seas, while Josh and Casey gamble on quota.

After historical wildfires strike Australia, the Irwins race to rescue as many animals as possible. Robert and Terri help the severely injured koala population.

A popular sea lion falls ill after ingesting a foreign object. Endangered snakes are coupled for breeding, and Andean bear cubs meet their fans.

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

A California Buddhist and an Oregon fisherman take on the dangers of the bush in Queensland, Australia. How will they fare against the local saltwater crocodiles.

Amateur outdoor adventurer Kaila joins forces with survivalist expert Trevor to try to survive in the isolated and inhospitable jungle in Ecuador's 'Cloud Forest'.

The team hesitantly take on a salvage in Virginia. After a rather precarious roof removal, they devise a plan to dismantle the silos while keeping them intact.

The crew stay close to home to salvage the old Salem Peacock Cleaners. Over 100 years old, the building is filled with antique laundromat parts.

Shawn gets his first taste of the shifting seabed. Ken tries a new perspective to find new ground, while Kris and Emily each try out rookie divers.

The miners seek more valuable ground. Shawn must fight the sea's shifting tide, Ken strains his excavator arm and new diver Brian saves Vernon's day.

Gold thieves hit the Dust Devils' Siberia lease and steal a fortune in gold. Marcus and Linden persevere through extreme heat to unearth more nuggets.

Jeremy Wade explores how fresh insights into ancient boat building techniques shed new light on the truth behind the biblical story of Noah's Flood.

The younger generation is put to the test as the fleet races to finish a gruelling season. But under such high pressure will all the crabbers return safely.

A cryptozoologist hunts for scientific proof of Bigfoot in the Alaskan wilderness. Experts investigate a vortex of energy linked to disappearances.

Josh Gates travels to ancient shrines hidden across Japan in search of the mystical Honjo Masamune sword. Along the way, Josh learns the ways of the samurai.

Josh Gates joins local divers in the Asian country of Myanmar to search for the Great Bell of King Dhammazedi. His hunt takes him into treacherous waters.

Bus-dwelling Virginia homesteaders struggle for a foothold in the wilderness. The Raneys undertake one of the biggest rescues ever to reunite the family.

Justin recruits his fiancé after admitting he's facing financial disaster. Plus, the Fire Crew face deadly snakes and the Cooke Brothers go down deep.

The Rookies battle busted hoses and finally hit treasure. Meanwhile, at their wash plant, the Cooke Brothers race to beat the worst drought in a decade.

Jake must confront his disorderly crew, forcing him to make a tough decision. Meanwhile, Keith deals with a knife injury to one of his deckhands.

Captains Joe and Tyler hit bluefin gold. Feeling pressure to live up to his famous father's legacy, strongman Niko changes tactics.

Keith must retrieve a lost anchor in 50-knot winds. Sig attempts a risky new fishing strategy. Rick faces losing a greenhorn to a gruesome injury.

A concerning weigh-in forces Paul on a 1400km trek for new mining equipment. In the remote Pilbara region, mechanical issues cause tensions for the Ferals.

Stonemason Shannon teams up with firefighter Tim in the extreme heat of Trinidad's tropical rainforests amongst tumultuous rainstorms and bubbling mud volcanoes.

A Swedish adventure guide and a Texas military vet tackle Australia's Outback. Windstorms, freezing temperatures, lack of sleep and cultural differences flare.

The crew heads to an old mill where they hope to salvage parts - if they can get them down safely. Plus, Mike and Robert see what they can do with an old barn.

The team travel to a shipyard to salvage a boat once used for Navy SEAL insertions. Their patience is tested once they realize the boat won't fit on the trailer.

Tensions fly as Brad leads The Reaper into hostile waters. Shawn hunts an elusive pay streak, and Ken puts a risky Myrtle Irene repair to the test.

The Gold, The Bad, & The Ugly. Shawn's rocky pay streak takes him for a wild ride. Kris raids another claim but a rival dredge fights back. Vernon loses patience with his crew.

The Dust Devils are poised to smash the biggest season tally ever. The Gold Timers hit paydirt. The Gold Gypsies' gold dream could finally be over.

Jeremy explores a new theory that could explain what happens in the world's most infamous stretch of water. Is this enduring mystery about to be solved.

A government shutdown shortens the season and starts off a chain reaction that forces the fleet to fish harder and faster to make the market deadline.

Experts examine whether an interdimensional portal in the Alaska Triangle led to the disappearance of an aeroplane carrying 44 military personnel in 1950.

Josh Gates traverses England, Wales and Scotland, wading through history and legend to search for evidence of a real King Arthur.

Josh Gates journeys across England to uncover the true story behind Robin Hood. He explores underground tunnels and finds what may be his final resting place.

The Raneys are in Kentucky to help the Tenhagens' homestead devastated by flooding. They devise a mobile escape pen for livestock and a floating greenhouse.

Justin and Becky risk their lives underground. Plus, opal hunting legend Col Duff is back, hunting long forgotten treasure.

The Fire Crew's season rests on a knife-edge as they battle their way back from a disastrous setback. Plus, the Opal Queen mines rock hard walls alone.

The coldest weather in nearly a decade threatens to crush hulls and freeze the sea. Meanwhile, a shocking mishap leaves one of the Hansens grasping for their life.

Campify This House! The crew helps a couple turn their chopped up, suburban cabin into the spacious, rustic Maine getaway they've always wanted.

The crew head to Westmoreland County, Pennsylvania, to save a classic bank barn that won't last another winter without help.