| Ingrid Bergman | Dr. Constance Petersen |
| Gregory Peck | John Ballantine aka Dr. Anthony Edwardes |
| Michael Chekhov | Dr. Alexander 'Alex' Brulov |
| Leo G. Carroll | Dr. Murchison |
| Rhonda Fleming | Mary Carmichael |
| John Emery | Dr. Fleurot |
| Norman Lloyd | Mr. Garmes |
| Bill Goodwin | House detective |
| Steven Geray | Dr. Graff |
| Donald Curtis | Harry |
| Director | Alfred Hitchcock |
| Producer | David O. Selznick |
| Writer | John Palmer; Hilary St. George Sanders |
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