I viewed a copy of a copy on video of this film and so the video quality was not that great. First, what did I like and not like? I didn't like the beginning or ending, but the rest of the movie was very good. Ingrid Bergman does a very fine job as the wife who has a secret to hide and will go to great lengths out of fear, hence the title of the movie, to prevent her husband from finding out. As the husband, Mathias Wieman does an excellent job playing the part of the kind, understanding Professor Wagner who is not as he seems. Overall, the film is a fine psychological thriller in the manner of Hitchcock and I won't give away the film noirish plot twist or the problematic, to me, ending. This movie is little known but well worth a look.