Dr. Constance Petersen
Ingrid Bergman
John Ballantine
Gregory Peck
Mary Carmichael
Rhonda Fleming
House detective
Bill Goodwin
Det. Lt. Cooley
Art Baker
Det. Sgt. Gillespie
Regis Toomey
Hotel masher
Wallace Ford
Matron (uncredited)
Jean Acker
Railway Gateman (uncredited)
Irving Bacon
Ticket Taker (uncredited)
Richard Bartell
Gateman (uncredited)
Harry Brown
John Ballantine as a Boy (uncredited)
Joel Davis
Dr. Murchison
Leo G. Carroll
Nurse (uncredited)
Jacqueline deWit
Dr. Anthony Edwardes (uncredited)
Edward Fielding
Man Leaving Elevator (uncredited)
Alfred Hitchcock
John Ballantine's Brother (uncredited)
Teddy Infuhr
Sheriff (uncredited)
Victor Kilian
Hallett - Railroad Clerk (uncredited)
George Meader
Policeman at Train Station (uncredited)
Matt Moore
Dr. Brulov's Housekeeper (uncredited)
Constance Purdy
Police Captain (uncredited)
Addison Richards
Norma Cramer (uncredited)
Janet Scott
Dr. Alexander Brulov
Michael Chekhov
Secretary at Police Station (uncredited)
Clarence Straight
Bellboy (uncredited)
Dave Willock
Dr. Fleurot
John Emery
Dr. Graff
Steven Geray
Dr. Hanish
Paul Harvey
Dr. Galt (uncredited)
Erskine Sanford
Mr. Garmes
Norman Lloyd
Harry
Donald Curtis
Original Music Composer
Miklós Rózsa
Screenplay
Ben Hecht
Art Direction
Salvador Dalí
Second Unit Director
Charles Barton
Angus MacPhail
Producer
David O. Selznick
Director
James Basevi
Director of Photography
George Barnes
Sound Recordist
Richard DeWeese
Unit Manager
Fred Ahern
Production Manager
Richard Johnston
Special Effects
Jack Cosgrove
Novel
John Palmer
Assistant Art Director
John Ewing
Assistant Director
Lowell J. Farrell
Interior Designer
Emile Kuri
Sound
Arthur Johns
Hilary St George Saunders
Clarence Slifer