Voice of the Whistler

Richard Dix

John Sinclair / John Carter

Lynn Merrick

Joan Martin Sinclair

Rhys Williams

Ernie Sparrow

James Cardwell

Fred (Doc) Graham

Tom Kennedy

Ferdinand / Hammerlock

Sam Ash

Gibson Motor Car Co. Executive (uncredited)

Egon Brecher

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

Charles Coleman

Sinclair's Butler (uncredited)

Otto Forrest

The Whistler (uncredited)

Byron Foulger

Georgie (uncredited)

Martín Garralaga

Tony, Fruit Peddler (uncredited)

John Hamilton

Doctor (uncredited)

Stuart Holmes

Sinclair Executive (uncredited)

Wilbur Mack

Sinclair Executive (uncredited)

Charles Marsh

Sinclair Executive (uncredited)

Harold Miller

Sinclair Executive (uncredited)

Forbes Murray

Sinclair Executive (uncredited)

Gigi Perreau

Bobbie (uncredited)

Frank Reicher

Dr. Rose (uncredited)

Clinton Rosemond

Train Porter (uncredited)

Frank J. Scannell

Druggist (uncredited)

Minerva Urecal

Georgie's Wife (uncredited)

Robert B. Williams

Pharmacist (uncredited)

Douglas Wood

Paul Kitridge - Attorney (uncredited)

First Man into Space

The Secret of the Whistler

Dillinger

Tormented

Within the Law

World for Ransom

Woman on the Run

Lottery

Repeat Performance

Stranger on the Third Floor

Mysterious Mr. Moto

The Mark of the Whistler

Trapped

Mountaintop Motel Massacre

The Whistler

Mercenary for Justice

Wall Street

Seven Swords

Darkness Falls

Lighthouse