The Mad Doctor

Basil Rathbone

Dr. George Sebastian / Dr. Langamann

Ellen Drew

Linda Booth

John Howard

Gil Sawyer

Barbara Jo Allen

Louise Watkins (as Barbara Allen [Vera Vague])

Ralph Morgan

Dr. Charles Downer

Martin Kosleck

Maurice Gretz

Kitty Kelly

Winnie

Hugh O'Connell

Lawrence Watkins

Henry Victor

Furber (Uncredited)

Wanda McKay

Girl at Charity Bazaar (Uncredited)

James Seay

Intern (Uncredited)

William Benedict

Mickey Barnes (Uncredited)

Tim Whelan

Director

Howard J. Green

Screenplay

Ted Tetzlaff

Director of Photography

Victor Young

Original Music Composer

Archie Marshek

Editor

George M. Arthur

Producer

Harry D. Mills

Sound Recordist

Stephan Pasternacki

Additional Music

Adolph Zukor

Presenter

Joseph C. Youngerman

Assistant Director

Robert Usher

Art Direction

A. E. Freudeman

Interior Designer