Frances Dee

Allison Lang

Brian Donlevy

Duffy Giles

Charles Butterworth

Felix

Helen Westley

Mrs. Hargraves

Henry Stephenson

Professor Jerome Hargraves

Sara Haden

Henrietta Hargraves

Etienne Girardot

Dr. Cotton

Gavin Muir

Dr. Barth

Paul Stanton

District Attorney

Julius Tannen

City Editor

Nigel De Brulier

Dr. Hall

Hilda Vaughn

Bertha

Philip Sleeman

Carl

William Ingersoll

Judge

Paul McVey

Coroner

Bruce Mitchell

Police Sergeant

John Carradine

Sanatorium Inmate (voice) (uncredited)

Don Rowan

Juror (uncredited)

Harry Strang

Court Attendant (uncredited)

Andrew Tombes

Jury Foreman (uncredited)