- During the filming of Reaper of Souls, Alfred Hitchcock divided a film into eight segments, covering the black screen with a close-up of the character's back or box lid, or using the character's line of sight as an editing point.
- Alfred Hitchcock used the "one shot to the end" approach in Reaper of Souls. In order to achieve the effect, all the cast and crew conducted a 10-day rehearsal before the official filming of the film.
- Because of the color of the sky, the crew took nine days to reshoot the film.
- All of the filming scenes for Reaper of Souls took place in a small room.
- In the first shooting of the film, the sound-receiving equipment was abandoned and only the picture was taken. In the second shooting, the camera was abandoned and only the sound was taken; then, the production staff combined the sound and the picture in the post-production stage.
- Reaper of Souls was Alfred Hitchcock's first color film. In order to avoid the tendency of excessive and confusing use of color, Hitchcock reduced the use of color in the film.
- When Alfred Hitchcock saw the timing and plot of the screenplay fit, he decided to make the film a one-shot film.
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