The Young Guns' season is threatened when JC is injured at a steer riding competition. The Bushmen finally strike opal while digging on the boundary of their claim;. The Cheal's struggle to get to their claim.

Isaac and Sofia -- the Opal Whisperers -- set out to prove themselves as miners. Jaymin and Noah explore a dangerous mine alone while the Blacklighters are hit with a crippling excavator breakdown.

Rory and Oscar are forced to operate their dad's 20-tonne drill rig for the first time. The Tarantos are struck down by sickness as they struggle to find Opals on their massive claim, and the Bushmen build a dangerous mine roof.

JC returns to White Cliffs after his accident while Blacklight Xavier misses a massive pocket of opal passing through the noodling machine; the Tunnel Rats start their season in a vermin-infested mine.

The Tarantos' excavator grinds to a halt at the bottom of their mine. The Cheals also face machinery failure as Rory busts their digger underground. The Bushmen's roof is on the edge of collapse.

The Misfits give it all they've got to prove their worth in the mine fields of South Australia. The Bishop loses his prized claim to competitors while the Tunnel Rats risk electrocution while operating their digger.

Joe and Tash fossick on the surface with hand tools after the Tarantos fails to bring up any color; the Opal Whisperers try constructing a noodler from scrap material while the Misfits narrowly avoid a collapse.

Machinery woes cause the Cheals to end their opal dreams and consider splitting ways. The Blacklighters move to a new site while Jaymin and JC work alone in claustrophobic tunnels.

In the wake of Government shutdowns, The Bushmen are forced back into their deadly mine. Dan and Renee's impatience could cost them their lives.

With water running critically low at their only wash dam, The Cheals work to restore a second agitator. Slim Pickings battle a bung wall breach.

In the race to meet a rainbow matrix order ahead of the Lightning Ridge Opal Festival, The Misfits bet everything on untested DIY contraptions.

Drowning in a sea of overburden, The Blacklighters face off against each other as Mark's inexperience with the dozer proves too much for Paul.