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)

Director

Director of Photography

Writer

Original Music Composer

Writer

Producer

Story

Editor

Sound

Assistant Director