A miscalculation costs the Blacklighters thousands of dollars.

The Cheals hit a massive pocket of plate sized opal in their open cut mine. Plus, Brutal Outback temperatures cripple Cozza with severe heat stroke.

The Blacklighters' team leader, Mark, is severely injured in a mining accident forcing Paul and John to work overtime on two separate claims.

The Mooka Boys are finally ready to start tunnelling toward black opal glory, until their last working machine suffers a catastrophic breakdown.

Mining on his own and desperate for cash, Dan Measey gambles on new but unproven opal-detecting AI technology. Slim Pickings are forced to relocate.

The Bushmen dig a newly drilled emergency shaft. The Mooka Boys are on a dangerous mission to crane a vital DIY shelter across the Lunatic Opal Field.

Oscar sends The Cheals on an important mission to unearth a rare green-orange gemstone for a potential buyer. The Mooka Boys get a motor problem.

On the eve of the famous Lightning Ridge Opal Festival, The Misfits battle to treat 150kg of matrix opal, forcing Cody to cook up a miracle.

Drowning in a sea of overburden, The Blacklighters face off against each other as Mark's inexperience with the dozer proves too much for Paul.

In the race to meet a rainbow matrix order ahead of the Lightning Ridge Opal Festival, The Misfits bet everything on untested DIY contraptions

With water running critically low at their only wash dam, The Cheals work to restore a second agitator. Slim Pickings battle a bung wall breach.

In the wake of Government shutdowns, The Bushmen are forced back into their deadly mine. Dan and Renee's impatience could cost them their lives.

The Blacklighters are hit with a double dose of disaster. The Bushmen are blindsided by a government decision to shut down thousands of opal claims.

Chris suffers a spider bite. Slim Pickings' Lee battles dangerous ground on a quad bike. A big mechanical failure halts Dan and Renee's enterprise.

The Cheals' dreams of expanding their Opal Empire are crushed by the reality of juggling two mines. Slim Pickings' Lee gambles on mystery opal dirt.

Sam smashes opal with a jackhammer in the Bushmen's mine. Plus, Rod and Les make a wager that will force the loser to wear one of Sam's pink shirts.

Slim Pickings' efforts to recycle precious dam water are derailed. The Blacklighters scrounge for any last opal in their Land of Promise Claim.

The Misfits, Angel Dempsey and rookie miner, Cody Polglase, must find an opal king stone for a bespoke pendant order. Oscar and Luca are forced above ground

A rookie miner gets trapped down a mine shaft. A dust storm forces the Blacklights to reluctantly return to the failed Land of Promise money pit.

The Bushmen put their lives on the line in the most dangerous mine they have ever worked. Plus, the Cheal's first dig of the season is brought to a grinding halt.