William Boyd
— Hopalong Cassidy
Andy Clyde
— California Carlson
Rand Brooks
— Lucky Jenkins
Dorinda Clifton
— Susan Crowell
Harry Cording
— Riker
Mary Newton
— Mrs. Crowell
Ian Wolfe
— Edwin "Deacon" Black
Earle Hodgins
— County Clerk Tom
Richard Bailey
— Lead Worker-Henchman (Oil Drillman)
Richard Alexander
— Smitty, hefty worker-henchman
Leo J. McMahon
— Burly Worker-Henchman with Torch