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