It's D-Day for the Clermont Diggers. They have just 48 hours to repay investor Dennis and now Leigh has gone missing in action. A $250,000 nugget is found close to the Ballarat Crew's mining lease.

The Clermont Diggers come up with a new plan to try and boost their daily gold output. But the radical strategy has deep flaws. The Rookie Miners unearth the biggest nugget of the season.

Donnie confronts poachers, who appear to be stealing gold from his lease, and a disaster dam-wall break threatens to end all hope of repaying their investor on time.

Gold mining legend, Ian Holland, takes on an apprentice in the hope of boosting his gold output. Rookie Miner Dennis is desperate to get his gold processing plant up and running.

Rookie Miner Dennis gambles half a million dollars on the purchase of a 62-acre gold mine in remote Queensland. Gold Sniper Levi breaks the Australian record for the biggest gold nugget ever sniped.

The Clermont Diggers are under pressure to repay $15,000 worth of gold to their investor or they risk losing their mine. The Mineshaft Hunters enter a dangerous abandoned gold mine.