Nick Beal (not his real name) has a haunting way of whistling in the fog, in which he seems at home. It's a symbol of the mystery of the man, which softly, like the fog itself, reveals itself to us. There are absorbing scenes involving Ray Milland's interplays with George Macready, Thomas Mitchell and Audrey Totter, and there is Franz Waxman's soundtrack score, all contributing to the mood of apprehension which prevails throughout in this quiet study of power. Anything said further here would reveal what we soon learn of .... well, of the man who whistles. Highly recommended.