Rex
Rex King of the Wild Horses
Acting
Rin-Tin-Tin Jr.
Rinty
Acting
Bob Custer
John Sheldon
Acting
Lucile Browne
Alice Ingram
Acting
Ben Turpin
Henry
Acting
Edmund Cobb
Henchman Jim Luger
Acting
Richard Cramer
Frank Nolan
Acting
Lafe McKee
Charles Ingram [Chs. 1, 3, 12]
Acting
Ernie Adams
Henchman Raymond
Acting
Slim Whitaker
Henchman Mack
Acting
Richard Alexander
Lewis R. Lou Salters [Ch. 1]
Acting
Jack Rockwell
Sheriff [Chs. 1, 7-8, 11-12]
Acting
George Chesebro
Henchman Parks [Ch. 1]
Acting