Rex

~ as ~

Rex King of the Wild Horses

Rin-Tin-Tin Jr.

~ as ~

Rinty

Bob Custer

~ as ~

John Sheldon

Lucile Browne

~ as ~

Alice Ingram

Ben Turpin

~ as ~

Henry

Edmund Cobb

~ as ~

Henchman Jim Luger

Richard Cramer

~ as ~

Frank Nolan

Lafe McKee

~ as ~

Charles Ingram [Chs. 1, 3, 12]

Ernie Adams

~ as ~

Henchman Raymond

Slim Whitaker

~ as ~

Henchman Mack