Characters played by William Boyd
Bill Hopalong Cassidy
Characters played by Andy Clyde
California Carlson
Characters played by Rand Brooks
Lucky Jenkins
Characters played by Robert Emmett Keane
Professor Dixon
Characters played by Jane Randolph
Jessie Dixon
Characters played by Steve Barclay
Bruce Landy
Characters played by Harry Cording
Duke
Characters played by Earle Hodgins
Sandler
Characters played by Robert Bentley
Barton
Characters played by William 'Wee Willie' Davis
Blackie
Characters played by Forbes Murray
Colonel Jed Landy
Characters played by Glen B. Gallagher
Lieutenant
Characters played by Ben Corbett
Sergeant
Characters played by Fred 'Snowflake' Toones
Speed
Characters played by Clem Fuller
Henchman
Characters played by Joe Garcio
Henchman
Characters played by Johnny Luther
Henchman
Characters played by Jack Parker
Henchman
Characters played by George Sowards
Henchman