The Mad Doctor of Market Street

Lionel Atwill

Dr. Ralph Benson, posing as Graham

Una Merkel

Aunt Margaret Wentworth

Nat Pendleton

Red Hogan

Claire Dodd

Patricia Wentworth

Anne Nagel

Mrs. William Saunders

Hardie Albright

William Saunders

Richard Davies

Jim

John Eldredge

Dwight, Ship's Officer

Mala

Barab

Noble Johnson

Native Chief Elan

Hans J. Salter

Music Director

Russell A. Gausman

Set Decoration

Vera West

Costume Design

Paul Malvern

Associate Producer

Joseph H. Lewis

Director

Al Martin

Screenplay

Jerome Ash

Director of Photography

Ralph Dixon

Editor

Jack Otterson

Art Direction