- early in the film sitting in a hotel lobby with a baby on his knee.
- The scene where Gromek is killed was written to show how difficult it really can be to kill a man.
- Keith Waterhouse and Willis Hall did extensive (uncredited) rewrites on the script.
- Bernard Herrmann wrote the original score, but Universal Pictures executives convinced Hitchcock that they needed a more upbeat score. Hitchcock and Herrmann had a major disagreement, the score was dropped and they never worked together again.
- The Swedish actor Jan Malmsjo (who hade a small uncredited role as photographer in the final scenes in Helsingborg harbour and customs) found that a lot of signs were not written in correct Swedish so he helped the film crew to correct them.
- In the shot in which Alfred Hitchcock's cameo occurs, the music briefly changes to "Funeral March of a Marionette" by Charles Gounod, which is best known as the main theme for "Alfred Hitchcock Presents" (1955).
Please support TCMDB by adding to this information.Click here to contribute