William Boyd

as Hopalong Cassidy

Russell Hayden

as Lucky Jenkins

Sidney Toler

as Fernando "El Melancolio" Lopez Ramirez

Steffi Duna

as Chiquita

Sidney Blackmer

as Ralph Merritt

Pedro de Cordoba

as Valdez

William Duncan

as Buck Peters

Anna Demetrio

as Dolores

Eddie Dean

as Naples

Glenn Strange

as Slim Schultz

Jo Jo La Savio

as Ernesto

Roy Brent

as Henchman

Ken Darby

as The King's Men Member

Jon Dodson

as The King's Men Member

Martín Garralaga

as Bolo-Carrier

Herman Hack

as Rodeo Spectator

Bud Linn

as The King's Men Member

Johnny Luther

as Henchman

Jack Montgomery

as Barfly

Tex Phelps

as Rodeo Spectator

George Plues

as Rodeo Spectator

Rad Robinson

as The King's Men Member

Tony Roux

as Gaucho

George Sowards

as Henchman