Tensions escalate for new team the Opal Whisperers and an incident for the tunnel rats causes one member to down tools and take a crash course in opal cutting.
The Duels plan to extract opal hits a wall. The blacklighters search for surface opal to pay for their $15,000 Opalzilla
The world's toughest treasure hunters push their bodies and bank accounts to the limit on a quest to strike it rich, hunting the legendary Queen of Gems - Opal.
The Bushmen's super digger is damaged; Pete and Sam hunt for better opal dirt.
The Cheal's machinery is too big for the mine; the Blacklighters take a gamble on a new claim.
The Bushmen's new claim turns dangerous; Pete and Sam's vision takes shape.
The Blacklighters' claim runs dry; the Young Guns have big machines but they're running out of safe ground.
The Boulder Boys try to reach a suspected 20-meter-deep opal level by draining floodwater; Rod Manning uses his wife's opal ring as collateral.
The Young Guns spend all of their savings on a hydraulic digger that only causes problems; the Blacklights run out of opal.
Pete and Sam begin a risky project that could pay off big time with opal riches; the Bushmen's new equipment doesn't deliver.