A colorized version of the film was produced. It has been available on VHS (Turner Home Entertainment) in NTSC format for a while. A dual black & white/colorized Region-2 DVD version has been released in 2003 by Universal in PAL format.
Alfred Hitchcock also shot a German language version of this movie called Verdacht. In Verdacht, Hitchcock shot the scenes that showed the contents of the letters. Hitchcock knew German, due to the fact that he lived in Germany during his early film-making years.
