John Sinclair / John Carter

Richard Dix

Acting

Joan Martin Sinclair

Lynn Merrick

Acting

Ernie Sparrow

Rhys Williams

Acting

Fred (Doc) Graham

James Cardwell

Acting

Ferdinand / Hammerlock

Tom Kennedy

Acting

Gibson Motor Car Co. Executive (uncredited)

Sam Ash

Acting

Dr. Rose (replaced by Frank Reicher) (uncredited)

Egon Brecher

Acting

Sinclair's Butler (uncredited)

Charles Coleman

Acting

The Whistler (uncredited)

Otto Forrest

Acting

Georgie (uncredited)

Byron Foulger

Acting

Tony, Fruit Peddler (uncredited)

Martín Garralaga

Acting

Doctor (uncredited)

John Hamilton

Acting

Sinclair Executive (uncredited)

Stuart Holmes

Acting

Sinclair Executive (uncredited)

Wilbur Mack

Acting

Sinclair Executive (uncredited)

Charles Marsh

Acting

Sinclair Executive (uncredited)

Harold Miller

Acting

Sinclair Executive (uncredited)

Forbes Murray

Acting

Bobbie (uncredited)

Gigi Perreau

Acting

Dr. Rose (uncredited)

Frank Reicher

Acting

Train Porter (uncredited)

Clinton Rosemond

Acting

Druggist (uncredited)

Frank J. Scannell

Acting

Georgie's Wife (uncredited)

Minerva Urecal

Acting

Pharmacist (uncredited)

Robert B. Williams

Acting

Paul Kitridge - Attorney (uncredited)

Douglas Wood

Acting