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The Heli Hunters are forced to make an emergency landing in remote country in Western Australia, and Nev leads the Poseidon Crew to a secret patch in big nugget country in Victoria.

A cyclone threatens Michael's delivery of hazardous chemicals, and Lindsay transports 80,000 bees to a rainforest.

Ash is in the countryside near Beijing City focusing on wildlife conservation; he also heads to the village of Shixia to investigate how it is involved in preserving two sections of the Great Wall.

The team follows the failed route of a 1982 news team into the Valley of the Rocks, and Don and Taylor inspect possible Spanish mining artefacts.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

The Kristjansons make a pilgrimage to their ancestral home of Iceland; Elena and Jamie have a hard first day when their snowmobile sinks, and Trevor is set on not taking unnecessary risks this season.

Ash is in the countryside near Beijing City focusing on wildlife conservation; he also heads to the village of Shixia to investigate how it is involved in preserving two sections of the Great Wall.

Turbo is on the warpath as he takes the biggest gamble of his life, Steve Grahame battles 2000km of dirt, damage and dramas, and Glenn Waters faces disaster at the wheel of a monster load.

The season kicks off with a formidable task: renovating the "Buffa di Perrero" bivouac on Monte Cristallo with the Sixth Alpine Regiment of Brunico in spite of unpredictable weather.

The Cooks' latest purchase - a brand-new helicopter - can't seem to get off the ground, and Kurt Hammar's youngest son Kodi has dropped out of school to become a bull catcher.

Early 1900s newspaper reports claim that Taylor's ancestor Slumach placed a curse on his mine; a history of missing and dead prospectors support this claim, but where does legend end and truth begin?

The newly-discovered testimony of an elderly Indigenous woman claims to know where Slumach found his gold; after returning from their expedition empty-handed, a disturbing vision has Kru rattled.

The Gold Devils struggle to find a new source of gold in Western Australia, and the McGhies take their operation to the next level by bringing in a monster crusher.

A cyclone threatens Michael's delivery of hazardous chemicals, and Lindsay transports 80,000 bees to a rainforest.

The season kicks off with a formidable task: renovating the "Buffa di Perrero" bivouac on Monte Cristallo with the Sixth Alpine Regiment of Brunico in spite of unpredictable weather.

Miami, Florida: Marlborough House, a 13-storey condo tower built in 1961, collapsed with deadly debris in 2018; experts uncover an uncontrolled method of demolition that led to catastrophic failure.

The newly-discovered testimony of an elderly Indigenous woman claims to know where Slumach found his gold; after returning from their expedition empty-handed, a disturbing vision has Kru rattled.

The Gold Devils struggle to find a new source of gold in Western Australia, and the McGhies take their operation to the next level by bringing in a monster crusher.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

One of the Glovers' winch machines starts spewing thick white smoke on the block in the Kootenays, but that's less troubling than the season-ending news they receive from the government.

Mike takes on a 1967 Cougar with a tragic past, the boys battle it out at a swap meet, and the completion of the Model T gets Avery thinking.

Heli-loggers Integrated Operations are deep into their wet winter season on the west coast of Vancouver Island, and intense rain and fog threaten to strand two fallers on the hill.

There's an early kick-off to the winter fishing season on Lake Winnipeg as temperatures plunge and the Ice Viking fishing crews scramble to get onto the ice with their nets.

Snoddy chances a small weather window to try to fill his tanks with big red lobsters, a price plummet has massive implications for Squizzy, and Bryce gets a good offer that all comes down to weight.

The Gold Devils struggle to find a new source of gold in Western Australia, and the McGhies take their operation to the next level by bringing in a monster crusher.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

Nick and Jo risk one last supply before the wet season. Craig and his son deliver hay to drought-hit stations.

We visit the incredibly complex world of the airport; this is where the biggest and the fastest vehicles in the world share the same space and where the slightest error can result in catastrophe.

David Muise teams with Adam for a new adventure in the search for Slumach's lost gold mine.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

Chris starts his season with a massive catch of Tullibee, but happiness is short-lived when all of his nets then freeze into the ice; meanwhile, Justin and Mike start in Hecla and hit the motherlode.

We visit the incredibly complex world of the airport; this is where the biggest and the fastest vehicles in the world share the same space and where the slightest error can result in catastrophe.

Matt Adams rides a volatile load of bulls into a world of trouble, Yogi tests his truck and his patience to the limit, and the Stephens Brothers battle the backwoods to rescue millions of angry bees.

As renovation works commence on Monte Cristallo, Giovanni and Paolo must contend with logistical challenges; with the help of another carpentry team, they race against time to prepare materials.

The Curzels face their toughest phase yet with the bivouac nearing completion; they forge ahead with the construction buoyed by the arrival of reinforcements and a shared sense of purpose.

Early 1900s newspaper reports claim that Taylor's ancestor Slumach placed a curse on his mine; a history of missing and dead prospectors support this claim, but where does legend end and truth begin?

The newly-discovered testimony of an elderly Indigenous woman claims to know where Slumach found his gold; after returning from their expedition empty-handed, a disturbing vision has Kru rattled.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

Mike takes on a 1967 Cougar with a tragic past, the boys battle it out at a swap meet, and the completion of the Model T gets Avery thinking.

Nick and Jo risk one last supply before the wet season. Craig and his son deliver hay to drought-hit stations.

As renovation works commence on Monte Cristallo, Giovanni and Paolo must contend with logistical challenges; with the help of another carpentry team, they race against time to prepare materials.

A Mississippi River interstate crossing is discovered to be in danger of imminent collapse in Memphis; experts uncover severely compromised load-bearing tension members with a catastrophic weakness.

When prospector Volcanic Brown went missing in 1931, rumours of his disappearance tied him to Slumach's gold; Don and Taylor investigate a strange marking on prospector tools found in the Upper Pitt.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

There's a chance that a million dollars' worth of timber could be stranded unless Craig figures out a plan; down in the valley, Brent is weeks behind on his latest job.

A 1969 Road Runner gives Mike a run for his money while his generosity gets out of hand, and shop dog Lincoln gets a special surprise.

The Peters Contract Logging crew in the southern part of the province move their 40-year-old yarder onto a new block, but a series of mechanical issues set them back before they can even get started.

The temperature drops as the fishing crews continue targeting the most valuable fish possible, but as the lake ice locks into place, it presents a whole new set of challenges.

Squizzy lays a trap for one of his competitors as he makes a late charge up the leaderboard, and a rising market gives Snoddy hope that he can strike a better deal.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

A house relocation goes off-track when drivers Ross and Jerry find power poles blocking their way.

Mike's crew builds a 1969 El Camino to compete in a full-contact "Hit to Pass" race against their biggest rival who plays by his own rules.

Kru and Daryl move earth in search of Slumach's gold, and Adam discovers a cave rumoured to be Volcanic Brown's final resting place.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

Justin and Mike experience a violent ice-quake that leaves them rattled; after their best start ever, Justin and Mike's season goes wrong as two of their nets are swept away on the shifting ice.

Mike's crew builds a 1969 El Camino to compete in a full-contact "Hit to Pass" race against their biggest rival who plays by his own rules.

Owner operator Justin Harrison is on an epic haul up through the red heart of Australia. (Series 7,

The Curzels face their toughest phase yet with the bivouac nearing completion; they forge ahead with the construction buoyed by the arrival of reinforcements and a shared sense of purpose.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

Jacqui and Andrew blaze a trail into a corner of Fish Creek but a washout threatens to stop their 40-tonne bulldozer in its tracks, and the Gold Devils roll the dice on a costly move to new ground.

We visit the incredibly complex world of the airport; this is where the biggest and the fastest vehicles in the world share the same space and where the slightest error can result in catastrophe.

Reza sets off on a quest to be the first to capture the mysterious dugongs of Bahrain on camera.

Bad weather wreaks havoc for the Chieftain crew, Squizzy calls a top-secret contact for inside information, and the Jager fishing dynasty is on shaky ground.

Snoddy chances a small weather window to try to fill his tanks with big red lobsters, a price plummet has massive implications for Squizzy, and Bryce gets a good offer that all comes down to weight.

Squizzy lays a trap for one of his competitors as he makes a late charge up the leaderboard, and a rising market gives Snoddy hope that he can strike a better deal.

The Heli Hunters are forced to make an emergency landing in remote country in Western Australia, and Nev leads the Poseidon Crew to a secret patch in big nugget country in Victoria.

The Gold Devils struggle to find a new source of gold in Western Australia, and the McGhies take their operation to the next level by bringing in a monster crusher.

Jacqui and Andrew get trapped behind the line of a devastating bushfire, and the Gold Devils are torn apart when a team member goes off on their own.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

Paul's mine makeover team help a team of ex-servicemen become skilled goldminers as they strive to fund their veteran's charity and overcome the crippling legacy of their service via prospecting.

Paul's team deal with hardship and heartbreak as they help up-and-coming prospector Jarrod Crosbie; Jarrod is trying to pursue his dream of abandoning the city to become a full-blown prospector.

The Mine SOS team have just six days to install a full-scale hard rock mining operation and deliver a potentially life-changing payday for hard rock rookies Nathan Malatesta and Steve Ogilvie.

Six strangers from across the US set out on the mission of a lifetime to Greenland's brutal landscape; do they have what it takes to overcome obstacles before winter closes in and shuts them down?

The miners realise that Greenland's harsh environment is a monumental challenge; with their equipment not good enough and finding nothing but rocks, Ray begins to wonder if he's done the right thing.

Neil and Tom are facing their biggest ever carp fishing challenge as they head off to an inland sea in France in search of a massive common carp that was last caught in 2021 weighing 103 pounds.

Catastrophe strikes in California as one of America's most vital intersections is brought down in an inferno, and why did a routine demolition in the Australian capital of Canberra turn to tragedy?

There's a miraculous escape in Arizona as a railroad inferno takes down a vital river crossing, and a trailblazing concert hall cooks up a storm in downtown LA in California.

From the extraordinary to the ridiculous, this series uncovers the epic fails and near misses engineers would rather not talk about. We analyse what went wrong and reveal how they are being fixed.

A routine bridge demolition over one of America's busiest interstates in Ohio goes tragically wrong, and a catastrophic dam collapse causes a tsunami of destruction in southern California.

From the extraordinary to the ridiculous, this series uncovers the epic fails and near misses engineers would rather not talk about. We analyse what went wrong and reveal how they are being fixed.

Neil and Tom are facing their biggest ever carp fishing challenge as they head off to an inland sea in France in search of a massive common carp that was last caught in 2021 weighing 103 pounds.

There are headaches on the horizon for Steve taking on the Tanami with a trailer load of trouble.

Sludge and the Phantom fight the elements and an old river boat undergoes a makeover.

Gale-force winds tear across the outback, causing pandemonium for bull catchers; when hats and helicopters are tossed around by 40-knot winds, Kurt must weigh his goals against the safety of his team.

Ash's Great Wall adventure begins in Henan Province searching for the origins of the Great Wall; he also seeks out the birthplace of kung fu and dives into the Panjiakou reservoir.

Ash is in the countryside near Beijing City focusing on wildlife conservation; he also heads to the village of Shixia to investigate how it is involved in preserving two sections of the Great Wall.

Ash examines one of the oldest Great Wall sections at Zhangjiakou - which has been fortified by eight consecutive dynasties - and immerses himself in the footsteps of ancient explorers at Wulouggou.

Ash camps beside the Qin section of the Great Wall anticipating sunrise, wrestles an Inner Mongolian champion, learns survival techniques from a desert expert and searches for a lost city.

Massive destruction as an oil refinery explodes in Texas; flooding in Iowa takes down a vital railroad crossing; in Australia, design flaws force a rebuild of Melbourne's hottest tourist attraction.

There's tragedy in New Orleans as a hotel construction project crashes to earth, and also a catastrophic bridge collapse on a North Carolina college campus.

Science documentary - Ep. 7. A major freeway bridge is brought to its knees in a deadly disaster in Arkansas; in the UK, the Royal Air Force races to save a failing dam... and the town below it.

A suburban road collapses without warning in Texas, and what caused one of the deadliest disasters in US history to devastate a Kansas City hotel?

We visit the incredibly complex world of the airport; this is where the biggest and the fastest vehicles in the world share the same space and where the slightest error can result in catastrophe.

Reza sets off on a quest to be the first to capture the mysterious dugongs of Bahrain on camera.

Oppressive heat forces Jacqui and Andrew to work at night and encounter various threatening wildlife, and the Gold Devils travel on horseback and motorbike in an attempt to find a new patch of gold.

Mel and Alex are forced to explore dangerous old mine shafts looking for a new source of gold in Western Australia, and the Heli Hunters race to stake a claim and finish their season.

Alan and Salty encounter bullets and crocodiles as they seek gold in the Cape York rainforest, the Brumbies face another breakdown, and the McGhies' hopes are crushed by multiple machine breakdowns.

It's the end of the season for two teams in Western Australia; as the McGhies battle accidents and mechanical problems, a rich source of gold may have disappeared when the Gold Devils need it most.

Jacqui and Andrew must push through hostile country with their quad bike broken to find gold, and Neville and the Poseidon Crew get to explore German Gully to search for a legacy for Nev's family.

Dramatic phone footage reveals what it's like to get caught in a flight going up in flames and the science of how firefighters deal with aviation infernos.

Reza is in Saudi Arabia to reveal the secrets of a hidden frontier on the brink of historic change.

We follow six divers as they overcome freezing temperatures, shark attacks and the perils of free diving to deliver the gastronomic equivalent of diamonds to fine diners around the globe: sea urchins.

We follow six divers as they overcome freezing temperatures, shark attacks and the perils of free diving to deliver the gastronomic equivalent of diamonds to fine diners around the globe: sea urchins.

We follow six divers as they overcome freezing temperatures, shark attacks and the perils of free diving to deliver the gastronomic equivalent of diamonds to fine diners around the globe: sea urchins.

The lobster price has crashed, triggered by a global pandemic; skipper Squizzy is $150,000 down in revenue, Cracker manages to secure a buyer, and Jay and his nephews spend seven weeks without pay.

Reza is in Saudi Arabia to reveal the secrets of a hidden frontier on the brink of historic change.

The men of Henraux are attempting to complete company orders, Enrico is aided by the use of an innovative resin technique, and Michele is forced to reopen the Catino quarry earlier than planned.

The Catino quarry is back in operation thanks to Luca's commitment, while the Antonioli brothers risk everything in a never-before-attempted overturning operation at Gioia quarry.

As the wet season looms, the bull catchers race to make money; unflappable Kurt finally meets an obstacle he can't sidestep when his buyer falls through, and Clarry is nearly ready for retirement.

The newly-discovered testimony of an elderly Indigenous woman claims to know where Slumach found his gold; after returning from their expedition empty-handed, a disturbing vision has Kru rattled.

When prospector Volcanic Brown went missing in 1931, rumours of his disappearance tied him to Slumach's gold; Don and Taylor investigate a strange marking on prospector tools found in the Upper Pitt.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

A 1969 Road Runner gives Mike a run for his money while his generosity gets out of hand, and shop dog Lincoln gets a special surprise.

A house relocation goes off-track when drivers Ross and Jerry find power poles blocking their way.

The Curzels face their toughest phase yet with the bivouac nearing completion; they forge ahead with the construction buoyed by the arrival of reinforcements and a shared sense of purpose.

A deadly explosion strikes a major crude oil port creating an inferno of epic proportions in Corpus Christi, Texas; experts uncover a failed dredging operation that ruptured a propane pipeline.

In 1968, 71-year-old prospector Bernard Rover crawled through 10 miles of Pitt Lake wilderness in a fight for his life; he was disoriented and secretive about where he had been and what he had found.

Expert analysis and experience combine to put Shane and Kate onto some gold, and Nev takes Brent and Ethan to a secret spot in the Great Australian Desert.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

The Glovers race to get their wood and machines off Erie Mountain; Craig's crew work against the clock at Saddle Ridge, and he is convinced that the used machine he just bought will ensure success.

Mike battles to finish the Road Runner, trading gets nuts with Big Donny, and the crew help a million-dollar build get to the Detroit Autorama.

The Duz Cho Logging crew has only days to finish their winter block before a spring thaw destroys the road when a giant sinkhole shuts down production during the chaos.

Chris Kristjanson receives delivery of his dad's new lifting caboose, but he is reluctant to use it; meanwhile, the Husavik Crew faces frustration as they are unable to bring in the catch they need.

A major mechanical failure threatens Squizzy's entire catch, a wavering buyer forces Bryce to make a major decision, and the final weigh-in sees a winner declared.

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Jacqui and Andrew buy a quad bike to get to the site of an old gold rush in tropical Queensland, and Shane and Kate are falling further behind with more equipment failures in Western Australia.

Skipper Squizzy cashes in on a plan to thwart his rival Bryce, who ramps up the mind games by exploiting an old fishing superstition and challenging Snoddy for his prized patch.

Bad weather wreaks havoc for the Chieftain crew, Squizzy calls a top-secret contact for inside information, and the Jager fishing dynasty is on shaky ground.

Light is shed on the legend of Slumach, as an old map connects to an 1891 eyewitness account of his hanging.

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Trevor is having a terrible season with too few fish; 76-year-old Richard injures himself; Mike and Justin's hopes of a good season have been crushed as they struggle to reach their quota.

Bad weather wreaks havoc for the Chieftain crew, Squizzy calls a top-secret contact for inside information, and the Jager fishing dynasty is on shaky ground.

Hauling a volatile load, larger-than-life tanker driver Sludge avoids disaster; as Steve Grahame heads into unknown territory with busted equipment, Macka McCready sails into wild weather.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

When prospector Volcanic Brown went missing in 1931, rumours of his disappearance tied him to Slumach's gold; Don and Taylor investigate a strange marking on prospector tools found in the Upper Pitt.

In 1968, 71-year-old prospector Bernard Rover crawled through 10 miles of Pitt Lake wilderness in a fight for his life; he was disoriented and secretive about where he had been and what he had found.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

Mike battles to finish the Road Runner, trading gets nuts with Big Donny, and the crew help a million-dollar build get to the Detroit Autorama.

Steve takes a huge load from Alice Springs to Perth. Engine issues see Russell struggle to hit a delivery deadline.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

From the extraordinary to the ridiculous, this series uncovers the epic fails and near misses engineers would rather not talk about. We analyse what went wrong and reveal how they are being fixed.

Kru chases down a taped conversation with a man who claims to have found Slumach's billion-dollar gold deposit, and Taylor deciphers an old map possibly leading to the mysterious location.

Jacqui and Andrew are threatened by deadly snakes and sharp rocks on their hunt for gold; Shane and Kate are already on some gold, but will they have the equipment to extract it?

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Heli-loggers Integrated Operations are deep into their wet winter season on the west coast of Vancouver Island, and intense rain and fog threaten to strand two fallers on the hill.

Avery discovers a 1942 Harley-Davidson buried among Mike's junk while Mike helps Cassidy's off-road dreams come true.

Summer is in full effect, and that means that Integrated Operations is moving into the final phase of their project: loading four million dollars' worth of timber onto a giant floating barge.

Trouble continues with the Bombardiers for both Trevor and Chris Kristjanson; meanwhile, Justin and Mike head up to Hecla Island, where they hope the catch will be better than what they have so far.

Skipper Squizzy cashes in on a plan to thwart his rival Bryce, who ramps up the mind games by exploiting an old fishing superstition and challenging Snoddy for his prized patch.

A major health scare, unreliable machinery and the Victorian weather challenge the Poseidon Crew, and the Heli Hunters get into dangerous trouble chasing their dream of buying a gold lease.

The McGhies try to work two patches at once despite failing machinery, and Paul Mackie takes on a massive gold extraction process with the help of his family.

Squizzy uncovers the reason for his run of bad luck, an anonymous prank drives further division between Bryce and the skippers, and Snoddy reveals a game-changing secret.

Diehard's Michael and Cherie head out to their neglected surface claim to try their luck, and Ray and Paul's trusty old drill rig has blown its engine and the only option is to completely replace it.

A recurring marker points to a lost Spanish gold mine directly on Slumach's path to the gold.

Jacqui and Andrew buy a quad bike to get to the site of an old gold rush in tropical Queensland, and Shane and Kate are falling further behind with more equipment failures in Western Australia.

A giant crack in the ice continues to be an obstacle for all crews, and Trevor suffers through more broken-down equipment and makes a major purchase to try to salvage his season.

Diehard's Michael and Cherie head out to their neglected surface claim to try their luck, and Ray and Paul's trusty old drill rig has blown its engine and the only option is to completely replace it.

Faced with a monster load, Yogi's running out of time and road - meanwhile, concrete kings Jared Baldwin and Jonny Rayner are heading off the map and straight into trouble.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

New recruit Sherl hopes to restore faith with his bosses on Team Cook, and Clarry's Indigenous clients dream of building a new life on their ancestral lands using proceeds from caught bulls.

In 1968, 71-year-old prospector Bernard Rover crawled through 10 miles of Pitt Lake wilderness in a fight for his life; he was disoriented and secretive about where he had been and what he had found.

Kru chases down a taped conversation with a man who claims to have found Slumach's billion-dollar gold deposit, and Taylor deciphers an old map possibly leading to the mysterious location.

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Avery discovers a 1942 Harley-Davidson buried among Mike's junk while Mike helps Cassidy's off-road dreams come true.

Russell 'Crusher's' 30-year-old truck feels the strain on a run from Alice Springs to central Queensland.

We follow a unique and spectacular family business in the Legno House, a leader in high-altitude renovations of historical mountain huts on the Italian Dolomites.

Tragedy strikes as an earthquake wipes out a building full of people in Christchurch in New Zealand; experts investigate an inadequate structural design and weakness in critical supporting columns.

The search for Slumach's gold sends the team 300 kilometres away into the heart of the mystery.

Alan and Salty head to wine country to chase a gold rush legend, a drought threatens to end the season for Shane and Kate, and the Poseidon Crew use an oversized metal detector to find huge nuggets.

Jacqui and Andrew buy a quad bike to get to the site of an old gold rush in tropical Queensland, and Shane and Kate are falling further behind with more equipment failures in Western Australia.

The Peters Contract Logging crew in the southern part of the province move their 40-year-old yarder onto a new block, but a series of mechanical issues set them back before they can even get started.

Mike looks for redemption at a demolition derby that Avery enters a car of his own at, and Mike also restores a 1965 GMC van with an emotional past.

After two months off, Freya Logging moves into their summer block under the threat of a wildfire shutdown; however, setting up their high-tech fleet is marred by some unwelcome ghosts in the machines.

Richard and Mike have broken down with their Bombardier and can't get it started, but that's not all; when they do finally head onto the ice, they find that the fishing has dropped off.

Squizzy uncovers the reason for his run of bad luck, an anonymous prank drives further division between Bryce and the skippers, and Snoddy reveals a game-changing secret.

Mel and Alex are understaffed in Western Australia and get some desperately needed help for the Gold Devils, and the whole McGhies family pulls together to exploit a new gold-rich ground.