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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.

Jess and Phil dive into the mysteries of Niagara Falls and its history of violent deaths. They investigate reports of disturbing paranormal activity.

Jeff and Laura go fishing but are caught in a big electrical storm on the open water. Plus, the conditions lead to the island claiming its first victim.

The Devil And The South China Sea. Tropical storms hit, and the torrential rain and lack of food brings a survivalist to breaking point. One team is stalked by territorial sharks.

The team returns to the Norfolk ferry to get the large items that were left behind, including a crow's nest and staircase. Mike and Robert have a consultation.

Mike and Tay build a commemorative clock for the town of Kannapolis, North Carolina, before the crew heads back to salvage items left behind on the first trip.

In Nome, Alaska, the summer gold mining season kicks off. The Kellys hope to repeat the success of last season and Kris leads his team with a newfound determination.

Shawn is able to dig deeper than ever before, but he's also fighting to keep his family dynasty. Meanwhile, veteran skipper Vernon has rebuilt his war chest.

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.

A novice builder tries to construct a stone cabin in Vermont's White River Valley but his inexperience and the harsh winter push him to his limits.

Two brothers are building a high-end, off-grid vacation home in the middle of their 2,000-acre cattle ranch. They only have four months to complete it.

Captain Sig looks north to Russia to catch Norwegian reds. Meanwhile, a rekindled partnership between The Cornelia Marie and Time Bandit quickly turns sour.

Treasure hunters search for clues to a vast fortune they believe is hidden on Brazil's 'Snake Island.' But team tensions could derail the expedition.

Josh Gates dives into the mysteries of the Bermuda Triangle. He goes to the ocean floor, the skies and space to explore its intriguing disappearances.

To conclude his epic investigation, Josh Gates uses cutting-edge technology to investigate the Bermuda Triangle's most infamous shipwreck and lost flights.

Marty embarks on an ambitious, off-grid hydropower system following a storm. Matt creates a meat smoker, but a surprise accident leads to a construction site injury.

Marty helps Oregon homesteaders build a barn, Misty creates her first-ever subterranean garden, and Matt finds a humane approach to a mysterious predator threat.

The Mooka Boys may lose a potential investor due to their little mining progress. Disaster strikes for the Opal Whisperers when Sofia's hoist fails.

The Blacklighters discover opalised sea creatures in an ancient seabed. The Cheals close in on their biggest opal haul ever, but all is not as it seems.

Marcus and Linden are confronted by a rival gold prospector. The Gold Timers call in a geologist for help, and Robbie storms off the Ferals' lease.

The Dust Devils' critical water supply runs dry. Jacqui and Andrew find their biggest nugget so far, while the Poseidon Crew are hit by torrential rain.

Phil and Heather visit a castle reportedly built over a Nazi portal to hell. The team seeks proof of sinister activity beneath the castle's chapel.

Josh Gates takes a closer look at the Amityville Horror, the strange fate of a Civil War submarine crew, and spontaneous human combustion.

Phil and Jess travel to Monterrey, Mexico, where locals have encountered witches and black magic. They discover dark spells, blood rituals and animal sacrifice.

Extraction is on the other side of the island, but the sea is risky to cross. If they trek through the jungle, they might meet poisonous vipers and centipedes.

Tensions start to rise between teams as they get territorial over hunting ground. Plus, one survivalist is bitten by a snake and requires urgent medical attention.

The crew stays local and heads just down the street in Roanoke where they salvage a one-of-a-kind sign and pick through an old meeting hall.

The team heads to a local shopping centre to salvage a large, decorative frame, rolling doors and more. They also find great items from a pick in New Jersey.

Shawn's crew are busy trying to reach the one thousand-ounce goal. Plus, the Kellys face howling winds and ripping currents as they move The Reaper into the sea.

Vernon and his crew get stranded in the Yukon. Shawn has a good luck charm in his son. Ken suffers a mechanical setback and Emily sends a rookie diver underwater.

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.

A man who has always dreamed of living off the grid needs to finish his tricky build before winter arrives. He has taken on a huge project in upstate New York.

A man surprises his wife for their wedding anniversary. He secretly builds a holiday home with an L-shaped eco-shell to blend into the surroundings.

Josh's brother Shane gets caught in the bight as a typhoon slams the Cornelia Marie. Plus, Rip faces a crisis when a greenhorn collapses unconscious.

The team gear up for their first venture onto Snake Island, where they'll face triple-digit heat and one of the world's deadliest vipers.

Josh Gates investigates the most mysterious airline disaster in American history. He searches for answers to why Northwest Flight 2501 vanished.

Josh Gates explores places where unusual heroes rule the day in Madagascar, India and Mexico.

Threatened by an approaching wildfire, Stuart and Toni Rinker need a solution to their failing Idaho homestead. But, Stuart opposes the Raneys' fire-proofing plans.

A homestead in danger of a raging California wildfire prompts Marty to clear cut surrounding trees and create an evacuation ark for the Grants' livestock.

The Mooka Boys attempt to reach a new mine on a treacherous opal field. Plus, the Blacklighters are almost buried alive mining opal in unstable tunnels.

The Opal Whisperers' partnership with veteran miner Uwe ends abruptly. The Misfits finally hit old timers' workings at the bottom of their open cut mine.

A game changing piece of equipment leads the Ferals to their biggest nugget haul of the season. Plus, Shane and Russell battle unseasonal weather.

The Poseidon Crew are slowed down by fierce storms. Jacqui and Andrew encounter a deadly insect, while the Gold Timers try to fix their dry blower.

Catastrophe strikes in the heart of Minnesota. In Denmark, a railway tragedy exposes a security breach that affects the whole of Europe.

When a tornado outbreak tears through the Midwest, survivors capture it all on their cameras. In Mississippi, a monster EF-4 strikes Rolling Fork.

A murderous monster is said to lurk in the swamplands near New Orleans. Phil and Jess investigate the bloodthirsty beast that terrorises the Bayou.

Three of the remaining teams trek through the dense, snake-filled jungle. The journey quickly turns to chaos and one survivalist must be medically evacuated.

With the extraction day looming, two more critical survivalists struggle. Plus, Jeff changes strategy but a medical emergency stops him in his tracks.

The crew salvages an old country store. Using materials from the project, Mike and Robert create a tribute bench for a veterans' retreat.

The team heads to Winchester, Virginia, to salvage an abandoned orchard barn, but they must pick through years of trash and treasures before they can begin.

Crew conflict in winter weather puts Johnathan's leadership to the test. Sig and Mandy risk a heavy fine chasing the biomass along a boundary line.

Johnathan drives the Time Bandit into towering waves to haul the riskiest set of his career. Jake faces a potentially unstoppable magnesium fire.

Hampered by damage, Sig must outmanoeuvre an unknown captain to hold onto his ground. Jake allies with Wild Bill to make a critical deadline.

Johnathan's crab pots are in peril. Sig seeks a Bairdi hotspot with a decades-old computer. Jake's short on crew and must put his niece on hydraulics.

A vicious storm threatens to end the Misfits season early. Plus, Issy attempts a new black-lighting technique to impress Opal Joe.

The Misfits discover they're losing precious opal, so they attempt a dangerous night dig with an excavator and ultraviolet blacklights.

The Bushmen's home-made hoist and bucket fails. The Opal Whisperers, Sofia and Isaac, get trapped at the bottom of their open cut mine in sweltering temperatures.

Patrick Gundersen's team tackles harsh terrain in the hunt for aquamarine. Plus, the Rubyvale Boys battle against mechanical malfunctions.

Newcomer, Neil Wilkinson Jr., abseils down a deadly mineshaft in search of cubic fluorite, while Jarrin and Hugh take the plunge into frigid waters.

The Rubyvale Boys help a neighbour in need for a cut of the sapphire spoils. Tom heads to the Tasmanian mountains in search of meteorite-impact glass.

Deep in Western Australia's Goldfields, three teams of hardcore gold prospectors risk their dreams and futures, in pursuit of the ultimate reward.

Mechanical disasters and a high-stakes gamble threaten to derail the gold season for Dirt Dogs, Vern and Leon and Gold Gypsies, Chris and Greg.

The Dirt Dogs are forced to uproot their entire operation. The Gold Gypsies face a major decision. Henri and Kelli strike salt-lake gold.

Matt tackles a dangerous hoard in the Pennsylvania woods filled with high-value guns and ammo. The property is packed with heavy equipment and scrap.

In New England, Matt tackles the largest hoard he's seen in 20 years of business. He seeks out military aircraft parts and vintage toys.

After numerous eyewitness accounts of the Tasmanian tiger in Australia, Forrest heads to the Cape York Peninsula in search of this unique species.

Phil and Heather visit a castle reportedly built over a Nazi portal to hell. The team seeks proof of sinister activity beneath the castle's chapel.