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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.

The Dust Devils' operation halts and the hold-up could cost them thousands of dollars. A cyclone causes damage to Shane and Russell's wash plant.

A young couple sets out to create their dream treehouse retreat in Northern Georgia overlooking the breath-taking Blue Ridge Mountains.

Any building project is stressful, especially if the build is in the middle of nowhere. A family builds on their 46-acre land by the Smoky Mountains.

One Hell Of A Story To Tell. Captain Rip heads into an Arctic storm to attempt the riskiest helicopter rescue in recent history. Plus, John fights to save the Time Bandit at anchor.

Sightings of ghost ships in the Bermuda Triangle have been reported for centuries. Experts and scientists use cutting-edge technology to try and solve the mystery.

Josh Gates travels the globe to unravel the mystery of humanity's origins. How did we survive to the modern day, and what does it mean for our future.

Josh Gates travels to Africa to find a distant relative and scale dangerous cliffs all to answer one question: Where did humans come from.

Soil poisoned by coal production hampers a Kentucky homestead. The Raneys must build a hillside garden on the only unpolluted land and find a source of clean water.

Part 1. A dangerous request from the Smith family in a Missouri flood zone forces the Raneys to build a dam and plan an entire cabin move.

The Opal Whisperers work underground together for the first time on a legendary claim. The Mooka Boys are forced to work Leif's late father's abandoned mine.

A Well That Takes On Water. The Digi Diggers need to explore new ground after mining opal too brittle to sell. The Bushmen find their new claim has been dug out by opal thieves.

After a frustrating day, the Ferals hit a gold hot streak. An injury rocks the Gold Timers, while Shane and Russell struggle with their homemade sluice.

Prospectors Jacqui and Andrew uncover gold in Queensland. The Poseidon Crew get some exciting news, while the Dust Devils spend big on new equipment.

Chris McCully and crew hit a paystreak so lucrative they call it 'Wall Street.' Shawn strikes gold at 40 feet under the ice. Vernon's diver faces a disaster.

Jane clashes with Emily's crew over being disrespected. Equipment failures cause delays for Chris and Shawn. Kris is thrilled to find his Crawler in action.

Jess and Phil are joined by The Ghost Brothers as they continue to investigate Mackinac Island's mysteries. They explore a lighthouse with a dark past.

Dropped into the South China Sea, 12 elite survivalists try to survive 40 days on land and sea. Two all-star survivalists start a 60-day challenge in the Philippines.

With resources dwindling, the survivalists risk their lives entering the shark-infested South China Sea in search of a meal they all desperately need.

The team heads over to the machine shop they bought, to see what they can find before renovating the house and determining how many new builds are needed.

The crew heads to Norfolk, Virginia, to test their sea legs and salvage a ferry including lights, skylights and a mural. Grayson helps Mike and Tay with a build.

In a race against winter, Shawn extends his sluice to get more gold. As Kris battles a bed of quartz, George enjoys a season-ending dive with his son.

Desperate to be Nome's gold king, Shawn risks the Christine Rose in dangerous waters. Plus, Ken struggles to free the Myrtle from the harbour.

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

A nature-loving architect builds a modern cabin in the Californian Redwoods. He faces challenges, but the final project will have views to rival the Big Sur.

An eco-friendly couple are battling against the harsh winter weather to build a timber and straw-bale cabin in Maine. They are building in a heavily wooded forest.

Sig struggles with a crewman who thinks he knows more than the captain. Plus, Captain Wild Bill fights to save his boat from the rocky Norwegian coastline.

Investigate America's most classified sites and their covert activities. Venture deep inside the Government's most sensitive, top-secret locations and analyse their purpose.

Josh Gates touches down in Normandy to investigate battles on land, air and sea. The expedition reveals a huge German bunker complex buried for 75 years.

Part 2. The Raneys must move an entire cabin into the flood zone as Marty's dam is tested. The surprise arrival of chicks means the coop needs an upgrade.

The Raneys create their first-ever self-automated homestead in the fierce Alaskan wilderness while firefighters Kim and Casey Boespflug are away on duty.

The Opal Whispers are forced to leave behind a rich opal seam in a mine on the verge of collapse. The Cheals are cut off from their mine by crippling floods.

Gale force winds threaten the Digi Diggers' dreams of an eco-mine. The Bushmen discover dangerous old workings while clearing out their new mine.

The Gold Timers fight back against gold thieves. Machinery problems continue to plague the Dust Devils, while Marcus is panicked when Linden goes missing.

The Poseidon Crew are desperate to find fine gold to fund their expensive operation. Rookie team Jacqui and Andrew find gold nuggets in Queensland.

A Las Vegas couple and their son leave the city and head to southern Utah to build a modern A-frame. They face strong winds and challenging terrain.

Two brothers team up with their girlfriends to build a yurt that can survive harsh Maine winters. They start off confident but are soon challenged.