4x1 - Episode 1

February 6, 2020

In Mintabie, South Australia, The Tunnel Rats are under extra pressure as rival miners close in on their claim. In Sheepyards, NSW, The Bushmen must brave an abandoned mine to remove a dead animal. Meanwhile, rookie prospectors The Poms seek a prize opal to kickstart their mining career.

4x2 - Episode 2

February 13, 2020

The Bushmen face off against a miner who has illegally dug on their claim.

4x3 - Episode 3

February 20, 2020

The Tunnel Rats deal with an unexploded bomb and hazardous gases; The Bros attempt to fit their equipment into a new mine; The Poms make their first trip underground.

4x4 - Episode 4

February 27, 2020

In Opalton, Boulder Boys Aaron and Ron's excavator has a close call.

4x5 - Episode 5

March 5, 2020

The Bushmen take a big risk, trying out a new mining method deep below the ground, and injury slows down progress for The Bros and The Poms are struggling to find their first piece of opal.

4x6 - Episode 6

March 12, 2020

The Boulder Boys, who are within reach of their ,000 season target, chase old leads that could see them strike it rich and The Bushmen face a disaster underground.

4x7 - Episode 7

March 19, 2020

A violent summer storm sees The Young Guns race to save their only claim from a flood; meanwhile The McFarlanes must build a drill from spare parts.

4x8 - Episode 8

March 26, 2020

Tunnel Rats Bayden Pearse and Leese Grobe get the lifeline they desperately need. Meanwhile, Pete Cooke and Sam Westra are on the last dig of their season, and 20-year-old Sam must decide whether to quit opal mining for good.

4x10 - Episode 10

April 9, 2020

Following six teams across Australia as they search for the country's most iconic gemstone.

4x11 - Episode 11

April 16, 2020

4x12 - Episode 12

April 23, 2020

4x13 - Episode 13

April 30, 2020

4x14 - Episode 14

May 7, 2020

4x15 - Episode 15

May 14, 2020

4x16 - Episode 16

May 21, 2020

4x17 - Episode 17

May 28, 2020

4x18 - Episode 18

June 4, 2020

4x19 - Episode 19

June 11, 2020