Ingrid Bergman

Character: Dr. Constance Petersen

Gregory Peck

Character: John Ballantine

Leo G. Carroll

Character: Dr. Murchison

Michael Chekhov

Character: Dr. Alexander Brulov

John Emery

Character: Dr. Fleurot

Steven Geray

Character: Dr. Graff

Paul Harvey

Character: Dr. Hanish

Erskine Sanford

Character: Dr. Galt (uncredited)

Norman Lloyd

Character: Mr. Garmes

Donald Curtis

Character: Harry

Rhonda Fleming

Character: Mary Carmichael

Bill Goodwin

Character: House detective

Art Baker

Character: Det. Lt. Cooley

Regis Toomey

Character: Det. Sgt. Gillespie

Wallace Ford

Character: Hotel masher

Jean Acker

Character: Matron (uncredited)

Irving Bacon

Character: Railway Gateman (uncredited)

Richard Bartell

Character: Ticket Taker (uncredited)

Harry Brown

Character: Gateman (uncredited)

Joel Davis

Character: John Ballantine as a Boy (uncredited)

Jacqueline deWit

Character: Nurse (uncredited)

Edward Fielding

Character: Dr. Anthony Edwardes (uncredited)

Alfred Hitchcock

Character: Man Leaving Elevator (uncredited)

Teddy Infuhr

Character: John Ballantine's Brother (uncredited)

Victor Kilian

Character: Sheriff (uncredited)

George Meader

Character: Hallett - Railroad Clerk (uncredited)

Matt Moore

Character: Policeman at Train Station (uncredited)

Constance Purdy

Character: Dr. Brulov's Housekeeper (uncredited)

Addison Richards

Character: Police Captain (uncredited)

Janet Scott

Character: Norma Cramer (uncredited)

Clarence Straight

Character: Secretary at Police Station (uncredited)

Dave Willock

Character: Bellboy (uncredited)