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