The Bushmen's new rookie rushes into a deadly no-go zone while the Cheals attempt to revive their season; the Mooka Boys try a new technique to expose opal in colorless rock.

A bomb expert comes in to blast impenetrable rock for the Bishop; the Cheals race to move a rock-extracting blower before heat damages their machine and the Misfits battle avalanches and dust storms.

Handwritten clues left by Leif's late father help the Mooka Boys hunt for an abandoned mine; the Blacklighters battle choking dust on their dry claim and the Tarantos make emergency repairs on their machine.

Greg explores the hidden tunnels on his massive claim searching for white opal. The Tarantos' excavator springs a leak and the Blacklighters look for a new house.

The Bushmen gamble the last of their cash on their first ever drill rig; the Cheals, desperate for a big opal find, face off against turbulent weather; the Mooka boys hunt for treasure in a scorpion-riddled mine.

The Young Guns face dangerous roads and impenetrable mine walls and faulty electronics spark a fire in the Opal Whisperers' HQ. The Blacklighters risk losing their plan as their generator dies.

The Bushmen find a hidden shaft by falling into it and the Blacklighters brand-new investment is dead in the water; a busted jackhammer forces JC and the Young Guns to make emergency repairs halfway down the mine shaft.

The Bushmen are dismayed after taking over their new recruit's mine and finding it is both treacherous and light on opal; the Bishop turns to explosive means to move a wall; the Misfits work underground for the first time.

Scott and the Bishop cause an avalanche while trying to secure a wall. The Mooka Boys' bobcat suffers a critical failure and the Blacklighters dig into a rich and dangerous abandoned mine.

The Young Guns' hopes of breaking their drought get shattered after they accidentally smash a valuable gemstone; the Bishop loses Scotty underground; the Tarantos' hopes of exposing a rare opal pocket fall in jeopardy.

The Misfits prove their worth to Opal Joe with an ancient bulldozer on their last dig; the Opal Whisperers suffer from infighting; the Cheals race against the clock and seasonal storms to rescue their mission.

A massive lightning storm forces the Young Guns to work on a series of flooded dirt roads; the Bushmen risk it all in a dangerous area vandalized by opal thieves; the Blacklighters take their chances with night mining.