| Ingrid Bergman | Dr. Constance Peterson |
| Gregory Peck | John Ballantine |
| Leo G. Carroll | Dr. Murchison |
| Jean Acker | Matron (uncredited) |
| Donald Curtis | Harry |
| Rhonda Fleming | Mary Carmichael |
| John Emery | Dr. Fleurot |
| Norman Lloyd | Mr. Garmes |
| Steven Geray | Dr. Graff |
| Paul Harvey | Harvey |
| Erskine Sanford | Dr. Galt (uncredited) |
| Janet Scott | Norma Cramer (uncredited) |
| Victor Kilian | Sheriff (uncredited) |
| Wallace Ford | Hotel masher |
| Bill Goodwin | House detective |
| Dave Willock | Bellboy (uncredited) |
| George F. Meader | Hallett, railroad clerk (uncredited) |
| Matt Moore | Policeman at train station |
| Irving Bacon | Railway gateman (uncredited) |
| Regis Toomey | Sgt. Gillespie |
| Michael Chekhov | Chekhov |
| Addison Richards | Police captain (uncredited) |
A female psychiatrist interprets an amnesiac murder suspect's surreal dream.
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