The Blacklighters are forced to move Opalzilla to a new claim and the Cheals face season-ending engine failure.
The Misfits search for a new claim in perilous opal fields the Taranto brothers strive to fulfil their family legacy by mining on hallowed ground.
The Bishop invests in a mammoth new claim and the Tunnel Rats operate their one tonne digger for the first time.
The Bushmen are back in full swing and make progress towards this season's target. The Cheals run of bad luck continues with new set backs.
The Tunnel Rats start the season risking their lives with a one-tonne digger underground. The Young Guns are reunited and take on a treacherous open-cut mine.
Bushmen Rod and Les resort to felling their own timber to support a dangerous mine roof. The Cheals are forced to operate their Dad's drill rig for the first time.
The Blacklighters start the season underground and attempt to break virgin ground. The Young Guns take on a dangerous new mine in the search for rare pineapple opal.
Australia's toughest treasure hunters are back, taking on the extreme hardship of the Australian outback in pursuit of opal riches.
Difficult conditions force The Bushmen to enlist a rookie miner. The Cheals suffer setbacks above and below ground.
Extreme temperatures force the Blacklighters to attempt potentially dangerous mining at night. Disaster strikes the Young Guns when thousands of dollars worth of opal goes missing.