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.
The end of the season nears leading The Bishop to take a leap of faith. The bushmen seek out opal to fulfil their contract with their partners.
The Cheals rush the installation of a new wash plant after a breakdown halves their opal production; the Blacklighters test a new team member.
The Geran gang are running out of time and push their gear to the limit. In Queensland storms threaten to scuttle efforts to find opal and a mystery illness strikes Les.
The Bishop runs out of luck in his open-cut claim and resorts to explosives. The Young guns battle to get their new mine running.
Desperate for a payday The Cheals race against the storm. New team The Geran Gang protect their field from unwelcome visitors.
The Young Guns tackle their new mine with the lack of air causeing a headache. Pete and Sam have one last chance to find opal to keep their operation alive.
Dangerous storm damage at Rods Camp requires an urgent recovery operation. A hazardous build up of dirt in the Tunnel Rats mine brings them to a halt.
Tensions escalate for new team the Opal Whisperers and an incident for the tunnel rats causes one member to down tools and take a crash course in opal cutting.