Richard Dix
John Sinclair / John Carter
Acting
Lynn Merrick
Joan Martin Sinclair
Acting
Rhys Williams
Ernie Sparrow
Acting
James Cardwell
Fred (Doc) Graham
Acting
Tom Kennedy
Ferdinand / Hammerlock
Acting
Sam Ash
Gibson Motor Car Co. Executive (uncredited)
Acting
Egon Brecher
Dr. Rose (replaced by Frank Reicher) (uncredited)
Acting
Charles Coleman
Sinclair's Butler (uncredited)
Acting
Otto Forrest
The Whistler (uncredited)
Acting
Byron Foulger
Georgie (uncredited)
Acting
Martín Garralaga
Tony, Fruit Peddler (uncredited)
Acting
John Hamilton
Doctor (uncredited)
Acting
Stuart Holmes
Sinclair Executive (uncredited)
Acting
Wilbur Mack
Sinclair Executive (uncredited)
Acting
Charles Marsh
Sinclair Executive (uncredited)
Acting
Harold Miller
Sinclair Executive (uncredited)
Acting
Forbes Murray
Sinclair Executive (uncredited)
Acting
Gigi Perreau
Bobbie (uncredited)
Acting
Frank Reicher
Dr. Rose (uncredited)
Acting
Clinton Rosemond
Train Porter (uncredited)
Acting
Frank J. Scannell
Druggist (uncredited)
Acting
Minerva Urecal
Georgie's Wife (uncredited)
Acting
Robert B. Williams
Pharmacist (uncredited)
Acting
Douglas Wood
Paul Kitridge - Attorney (uncredited)
Acting