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

Synopsis 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.

Rookie team the Young Guns have a life-threatening moment hunting legendary pineapple opal. The Cooke Bros scramble to hunt on another miner's claim for a share of the find.

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

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

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.

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

The Bushmen are desperate for a breakthrough after a run of bad luck. And the Young Guns are under financial strain and fall out over their new mine.

The Tunnel Rats are under extra pressure as rival miners close in on their claim. And, the Bushmen must brave an abandoned mine to remove a dead animal.

The Bushmen confront a miner who has illegally dug their claim. The Young Guns must find a new source of opal when poisonous fumes force them to abandon their mine.