Two twists change this movie from what you expect to something else completely. In fact, the title doesn't even seem to match the plot, until those twists transpire. Then it hits its stride with a sense of lingering dread hanging over the proceedings, even when the antagonist is not on screen; actually it seems their absence simply serves to ramp up the tension - such is the skill with which this is directed and shot. Rhonda Fleming gives her usual slightly overwrought performance but it works for this movie as she senses the dangers others around her don't . Surprisingly, many scenes are written in far more depth and are acted with way more seriousness and earnestness (by Joseph Cotten and Wendell Corey) than they have any right to be in just a B-movie - but it works to add depth and empathy. Even the "killer" is not two-dimensional but seems plagued by doubts and confusion - all the while being quietly menacing, disturbing, and on the edge of an outburst of violence at any moment. There are touches of pathos, taut high-wire tension, intrigue and action - with at least one very memorable scene that still flashes in my mind - that make this a very worthy watch. Fans of Hitchcock will also enjoy the hints of perversion and cynicism - and some other key elements which that particular auteur would find appealing. A minor gem.