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A Big Island family finds their off-grid paradise strangled by destructive storms that bring deadly pests and invasive guava trees.

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.

The broke Bushmen are forced to trade opal to get a shaft drilled on a new claim. The Digi Diggers get lost exploring a terrifying abandoned mine.

Rick's start to the season only gets worse when he finds his truck's been ransacked. Plus, the Dirt Dogs ambush a gold thief and their chances of a profit takes a hit.

The Gold Gypsies get to work to reach their ambitious target. Plus, desperate to get back on track, Rick takes a gamble and heads to an old mining town. But will it pay off.

A widowed homesteader, realising she didn't learn the skills she needed before her husband's passing, is overwhelmed by her large family homestead.

Jess and Phil's investigation into unidentified objects off Catalina Island's coast heats up after the discovery of an extra-terrestrial underwater base.

Dropped onto an Alaskan glacier, all-star survivalists Laura and Steven stave off frostbite and hypothermia. Their skills and survivor instinct are tested.

In the Honduran rainforest, a survivalist and a hard-headed detective try to thrive for 21 days. But, jaguars, fire ants and a debilitating injury may stop them.

The Baggage Battlers head to the Boston Estates Auction to gamble on historical items, but is a document announcing George Washington's death the real thing.

The Baggage Battlers head to Greensboro, which is a major hub for imported and exported goods. But will they unearth any valuable items in the lot at Quality Salvage.

The Kellys try to make their gold-sucking Crawler work. Vernon's plans falter as he deals with health issues. Jane receives news of the birth of Emily's baby.

The Kellys try to make their gold-sucking Crawler work. Vernon's plans falter as he deals with health issues. Jane receives news of the birth of Emily's baby.

The Gold Devils move their multi-million-dollar operation in search of big gold. And, new team Vince, Bibi and Murray break ground on their dream lease.

A 29-year-old woman builds a 2,000-square-foot dream home with three bedrooms and three bathrooms out of mud and completely off the grid in Arizona.

Self-taught homebuilder Jacob Hamby constructs miniature cabins all over the US, surviving on the land while building his clients new homes.

Sig gets blown off course in extreme seas. Jake faces the loss of his longtime engineer. Monte takes the wheel of the Wizard when Keith collapses.

In 1945, five US Navy planes vanished without a trace in the Bermuda Triangle. Experts investigate why the planes disappeared and where they could be today.

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.

Novice farmsteaders in Iowa are on the verge of losing the legacy of their late father. The Raneys must quickly give them an off-grid masterclass.

Lisa jeopardizes a sale with a bespoke jeweller designer. Rod goes toe to toe with ratters who stole opal and equipment from their mine.

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

The Scrappers are robbed, threatening their chances of turning a profit. Meanwhile, the Millzilla unexpectedly breaks down, costing the Dirt Dogs $1,000 a day.

One of the gold hunters unearths a monster nugget that dramatically transforms their season. Plus, the Gold Gypsies are hit by the worst storm in decades.

Josh Gates recounts members' death-defying exploits! Two submariners plunge seven miles under the Pacific and a pilot skydives from the edge of space.

Ed Stafford challenges endurance athlete Matt Graham to a rematch in Scotland's cold and brutal highlands. They must endure freezing conditions to make it to Ben Nevis.