For the Rookies, there's tension as a new partner leads them on a wild goose chase underground. The Cooke Brothers' season is off to a bad start and Col's Crew is called on an emergency repair, wrestling a one-ton tire change.

The Rookies battle their biggest claim yet, and each other; Col's Crew must bring out the old machines to hunt a new opal seam; and it's heating up as the Fire Crew race a fuel leak, chasing legendary red fire opal.