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Six teams of opal miners from Australia embark on a risky mission to hunt for the most fascinating gemstone in harsh and remote landscapes.
The Young Guns face an uncertain future when James gets injured. The Bushmen find opal on the boundary of their mine, and rain slows down the Cheals.
The Blacklighters spot one of the deadliest snakes in the world. The Young Guns take on a dangerous new mine, and the Opal Whisperers hunt for cathedral pattern opal.
Rory and Oscar are forced to operate their dad's drill rig for the first time. The Tarantos are struck down by sickness, and the Bushmen build a dangerous mine roof.
The Tunnel Rats risk their lives to get a massive digger under the ground. Meanwhile, the Blacklighters are amazed to unearth their largest piece of opal.
The Bushmen's new worker faces a dangerous first day on the job. The Tarantos' overworked excavator grinds to a halt, and the Cheals are hit with more breakdowns.
The Bishop invests in a massive new claim, but he has no money left over for equipment. Meanwhile, the Tunnel Rats risk electrocution as they hunt for crystal opal.
The Misfits search for a new claim in Andamooka's dangerous opal fields. With no working machinery, the Opal Whisperers put their hopes into a bucket of Yowah Nuts.
The Blacklighters are forced to move their 10-ton processing plant to a new claim. Plus, the Cheals try to use abandoned truck parts to fix their agitator machine.
As the Bushmen search for a partner, their new rookie ignores safety protocols and rushes into a deadly no-go zone. Plus, the Cheals attempt to revive their season.
The Bishop hires a bomb expert to blast the impenetrable rock that's blocking access to a rich opal seam. Meanwhile, the Misfits face avalanches and dust storms.
The Mooka Boys risk being buried alive as they hunt for a legendary mine shaft. The Blacklighters are overwhelmed by choking dust on their bone-dry claim.
Scotty gets lost while exploring hidden tunnels on the Bishop's massive claim. Jack and Mickey are nearly crushed as the Tarantos try to move their machinery.
The Bushmen attempt drilling for the first time with a 50-year-old exploration rig. Plus, the Mooka Boys go on a treasure hunt in a scorpion-riddled mine.
The Young Guns rethink their black opal hunt when they face impenetrable mine walls. The Blacklighters' ambitious plan is threatened as their generator dies.
The Bushmen discover a hidden shaft by falling straight down into it. The Young Guns are forced to undertake emergency repairs halfway down a mine shaft.
The Bushmen take over their new recruit's mine, but the new claim proves equally treacherous with little sign of opal. Bishop resorts to explosives to move a wall.
The Bishop and Scotty struggle to make safe a wall and end up causing an avalanche. Meanwhile, the Mooka Boys' bobcat is hit with critical failure.
The Bishop loses his partner Scotty deep underground. The Tarantos' hopes of exposing a rare pocket of opal are in jeopardy and Young Guns make a big mistake.
The Misfits put their faith in an ancient bulldozer for the season's last dig. Meanwhile, infighting stalls efforts to unearth the Opal Whisperers' haul.
The Bushmen risk their lives digging where opal thieves removed the ceiling supports. Meanwhile, the Blacklighters switch to dangerous night mining.
The Bushmen bring in an explosives expert to blast through the toughest rock in Grawin. Plus, a brand-new team brings cutting edge technology to the opal fields.
The Cheals take on their most dangerous dig ever. The Bushmen trial a rookie to operate their exploration drill, but it doesn't go as smoothly as they'd hoped.
The Opal Whisperers work underground together for the first time on a legendary claim. The Mooka Boys are forced to work Leif's late fathers' abandoned mine.
The Digi Diggers need to explore new ground after mining opal too brittle to sell. The Bushmen discover their new claim has been dug out by opal thieves.
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 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.