John Sinclair / John Carter
Joan Martin Sinclair
Ernie Sparrow
Fred (Doc) Graham
Ferdinand / Hammerlock
Gibson Motor Car Co. Executive (uncredited)
Dr. Rose (replaced by Frank Reicher) (uncredited)
Sinclair's Butler (uncredited)
The Whistler (uncredited)
Georgie (uncredited)
Tony, Fruit Peddler (uncredited)
Doctor (uncredited)
Sinclair Executive (uncredited)
Sinclair Executive (uncredited)
Sinclair Executive (uncredited)
Sinclair Executive (uncredited)
Sinclair Executive (uncredited)
Bobbie (uncredited)
Dr. Rose (uncredited)
Train Porter (uncredited)
Druggist (uncredited)
Georgie's Wife (uncredited)
Pharmacist (uncredited)
Paul Kitridge - Attorney (uncredited)