William Boyd
— Hopalong Cassidy
Andy Clyde
— California Carlson
Rand Brooks
— Lucky Jenkins
Robert Emmett Keane
— Professor Dixon
Jane Randolph
— Jessie Dixon
Fred 'Snowflake' Toones
— Speed
Steve Barclay
— Bruce Landy
Harry Cording
— Duke
Earle Hodgins
— Sandler
Robert Bentley
— Barton
William 'Wee Willie' Davis
— Blackie
Forbes Murray
— Colonel Jed Landy
Glen Gallagher
— Lieutenant
Ben Corbett
— Sergeant