Helen Westley
Mrs. Hargraves
Henry Stephenson
Professor Jerome Hargraves
Sara Haden
Henrietta Hargraves
Etienne Girardot
Dr. Cotton
Paul Stanton
District Attorney
Bruce Mitchell
Police Sergeant
John Carradine
Sanatorium Inmate (voice) (uncredited)
Don Rowan
Juror (uncredited)
Harry Strang
Court Attendant (uncredited)
Andrew Tombes
Jury Foreman (uncredited)