In Sheepyards, The Bushmen seek a breakthrough after dealing with a string of bad luck. The Boulder Boys attempt to save a sinking excavator. The Young Guns suffer some financial blows.

The Bushmen dodge rockfalls in a potentially deadly new mine. The Fire Crew close in on a new deposit of precious black opal. The Boulder Boys struggle to drain their opal pit.

The Bushmen risk their lives in the fight to get their one-tonne digger down a 20-metre deep mine shaft. Plus, new alliances are forged as the Boulder Boys hit pay dirt.

Old partners Aaron Grotjahn and Col Duff reunite on a prospecting mission. The Tunnel Rats race to protect their claim as rival miners close in.

The Tunnel Rats blast their way to a fortune. Solo prospector Col Duff is stranded deep in the Queensland outback. Rookie Sam runs out of air underground.

Rookie team the Young Guns run into trouble as they look for pineapple opals. The Cooke Bros race against time hunting opals on another miner's claim. The Fire Crew run themselves broke.

Bushmen Rod and Les risk their lives reopening a long-abandoned mine. New team the Young Guns go deep underground for the first time, hunting pineapple opal.

New team The Bushmen clash with opal thieves raiding one of their mines. The Cookes hack an old digging machine. The Fire Crew hunt for a new deposit of rare black opal.