The Rookies battle busted hoses and finally hit treasure, Boulder Boys Aaron and Greg bring in an old monster about to self-destruct, and at their wash plant, the Cooke Brothers race to beat the worst drought in a decade.

The Fire Crew's season rests on a knife-edge as they struggle to battle their way back from a disastrous setback. The Opal Queen battles rock hard walls alone, desperate to find opal. And the Boulder Boys abandon their drill and hunt for opal by hand