Ingrid Bergman

Dr. Constance Petersen

Gregory Peck

John Ballantine

Leo G. Carroll

Dr. Murchison

Michael Chekhov

Dr. Alexander Brulov

John Emery

Dr. Fleurot

Steven Geray

Dr. Graff

Paul Harvey

Dr. Hanish

Erskine Sanford

Dr. Galt (uncredited)

Norman Lloyd

Mr. Garmes

Donald Curtis

Harry

Rhonda Fleming

Mary Carmichael

Bill Goodwin

House detective

Art Baker

Det. Lt. Cooley

Regis Toomey

Det. Sgt. Gillespie

Wallace Ford

Hotel masher

Jean Acker

Matron (uncredited)

Irving Bacon

Railway Gateman (uncredited)

Richard Bartell

Ticket Taker (uncredited)

Harry Brown

Gateman (uncredited)

Joel Davis

John Ballantine as a Boy (uncredited)

Jacqueline deWit

Nurse (uncredited)

Edward Fielding

Dr. Anthony Edwardes (uncredited)

Alfred Hitchcock

Man Leaving Elevator (uncredited)

Teddy Infuhr

John Ballantine's Brother (uncredited)

Victor Kilian

Sheriff (uncredited)

George Meader

Hallett - Railroad Clerk (uncredited)

Matt Moore

Policeman at Train Station (uncredited)

Constance Purdy

Dr. Brulov's Housekeeper (uncredited)

Addison Richards

Police Captain (uncredited)

Janet Scott

Norma Cramer (uncredited)

Clarence Straight

Secretary at Police Station (uncredited)

Dave Willock

Bellboy (uncredited)