The Blacklighters are hit with a double dose of disaster, busting their loader's brakes and the excavator's hydraulic arm. John's mission to operate Opalzilla solo fails, and Rachel must work the darkroom to scrape together desperately needed opal. The Misfits run out of dozer diesel at Lunatic Claim and move to German Gully on the search for concrete rainbow matrix in a mine on the verge of collapse, unearthing the biggest opal haul of their season. The Bushmen are forced to abandon one of the most dangerous mines they've ever worked in and are blindsided by a government decision to shut down thousands of opal claims across New South Wales, leaving the team with no ground to mine.