Harry Wingate, a rugged adventurer, is hired by a gem collector to retrieve a priceless opal, known as "The Blue Lightning," from Lester McInally, a super-criminal with an army of killers operating in the Australian outback.
| Actor | Role |
|---|---|
 Sam ElliottHarry Wingate | Harry Wingate |
 Robert CulpLester McInally | Lester McInally |
 John MeillonDr. William Giles | Dr. William Giles |
 Rebecca GillingKate McQueen | Kate McQueen |
 Robert ColebyNinian | Ninian |
 Max PhippsBrutus Cathcart | Brutus Cathcart |
 Ralph CotterillWords | Words |
| JJack DavisJahrgadu | Jahrgadu |
| BBob BarrettSullivan | Sullivan |
 Ray MeagherHale | Hale |
 Michael CarmanRoberts | Roberts |
| NNorm ErskineClancy | Clancy |
 Gary WaddellHennessey | Hennessey |
 Jeff TrumanSky Operator | Sky Operator |
 Garry WhoMechanic | Mechanic |
| CChris PangTinker Leone | Tinker Leone |
 Peter FordQuentin McQueen | Quentin McQueen |
 Ernie DingoPekeri | Pekeri |
 Kenneth RadleyRadio Operator | Radio Operator |
| DDennis HuntBecker | Becker |
| GGlenn BoswellVerna | Verna |
| BBob HicksJonson | Jonson |
| RRoy EdmundsMatthews | Matthews |