Dr. Jones

Dr. Bates / William Wilson

Hartney Drew

Dr. Jones' Nurse Hazel

Mr. Greene (uncredited)

Jack Saunders (uncredited)

Mrs. Saunders (uncredited)

Dr. Turner (as Fred Warren)

Miss Grant (uncredited)

Dr. Jones' Viennese Associate (uncredited)

Cop (uncredited)

Patient (uncredited)