Characters played by William Boyd
Hopalong Cassidy
Characters played by George 'Gabby' Hayes
Windy Haliday
Characters played by Russell Hayden
Lucky Jenkins
Characters played by Nora Lane
Nora Blake
Characters played by Harry Worth
Professor Hepburn
Characters played by Lois Wilde
Laura Peters
Characters played by Billy King
Artie Peters
Characters played by William Duncan
Buck Peters
Characters played by Jack Rutherford
Blackie
Characters played by Ernie Adams
Keno
Characters played by John Beach
Pete
Characters played by Ben Corbett
Henchman
Characters played by Frank Ellis
Henchman Dirk
Characters played by Leo J. McMahon
Bar 20 Cowhand
Characters played by Artie Ortego
Henchman
Characters played by Blackjack Ward
Henchman Slim