Creative Differences: David O. Selznick and Alfred Hitchcock clashed on various aspects of the film's production. This was the last time they ever worked together.
Keep Circulating the Tapes: The Criterion DVD is out of print, as is the Blu-Ray. The film is also completely unavailable on any streaming service.
Missing Episode: According to Ingrid Bergman, the Salvador Dalí dream scene was originally twenty minutes long. It lasts two minutes in the final film. The cut footage apparently no longer exists, although some production stills have survived in the Selznick archives.
Romance on the Set: Ingrid Bergman and Gregory Peck were both married to others at the time of production—Bergman to Petter Aron Lindström and Peck to Greta Kukkonen—but they had a brief affair during filming. Their secret relationship became public knowledge when Peck confessed to Brad Darrach of People in an interview in 1987, five years after Bergman's death: "All I can say is that I had a real love for her (Bergman), and I think that’s where I ought to stop…. I was young. She was young. We were involved for weeks in close and intense work."
The famous Dali dream sequence was originally MUCH longer. Unfortunately, producer David O. Selznick cut it short. Several production stills exist that give a glimpse of what we could have seen, but the actual footage appears to be missing.
Greta Garbo was considered at one point for the role of Constance.
Hitchcock originally wanted Cary Grant for John Ballantyne. His second choice was Joseph Cotten, who was also considered for Dr. Murchison.
Selznick wanted Jennifer Jones to portray Dr. Petersen but Hitchcock objected.
Early versions of the script used the words "sex menace," "frustrations," "libido" and "tomcat" in scenes involving the character of Mary Carmichael. These were eliminated when PCA director Joseph I. Breen strongly objected.
