James Stephenson

Dr. Paul Venner

Geraldine Fitzgerald

Dr. Mary Murray

Donald Crisp

Dr. Drewett

Barbara O'Neil

Miss Leeming

Montagu Love

Dr. Blake

Sig Ruman

Professor Herman Von Reiter

G.P. Huntley

Dr. Thornton

Richard Ainley

Dr. Hale

Bruce Lester

Dr. Bentley

Leonard Mudie

Mr. Tom Foster

Doris Lloyd

Mrs. Foster

Frank Reicher

Dr. Esterhazy

Hermine Sterler

Miss Hoffman

Billy Bevan

Chivers

Clare Verdera

Miss Dennis

Crauford Kent

Dr. Corliss

Alec Craig

Jeweler

Mary Taylor

Mrs. Kent a Patient (uncredited)

Bette Davis