The Cheals are hit with machinery failure when a digger busts underground.
Disaster strikes for the Young Guns as JC faces a major injury.
The Blacklighters face deadly taipans and a crippling excavator breakdown.
Days into mining, the Taranto family is suddenly struck down by illness.
The Tunnel Rats begin their season battling a vermin-infested mine.
The Misfits aim to prove themselves in mine fields of South Australia.
The Tarantos are forced to fossick on the surface with hand tools.
The Cheals' machinery woes put an end to their season and opal dreams.
The Bushmen's new rookie ignores protocols and rushes into a no-go zone.
The Bishop blasts some sturdy rock that's barring access to a rich seam.
Leif hunts for an abandoned mine using his late father's handwritten clues.
Greg Scully explores hidden tunnels on his massive claim, the Cathedral.
The Bushmen attempt drilling with a 50-year-old exploration rig.
The Young Guns rethink their hunt when they face impenetrable mine walls.
A busted jackhammer forces the Young Guns to undertake emergency repairs.
The Bushmen take over a new claim that proves to be equally treacherous.
The Bishop's struggle to make safe a wall ends up causing an avalanche.
The Tarantos' hopes of exposing a rare pocket of opal are in jeopardy.
The Misfits put their faith in an old bulldozer for the season's last dig.
The Bushmen risk their lives by digging beneath unsupported ceilings.
