This is a pretty decent example of film noir. The setting is the early 50's with the Communists trying to steal weapon secrets from the US Government.Richard Widmark is the suave pickpocket without scruples. He gives a pretty decent performance but there is nothing A-List about him. The interesting thing was that he was not only an anti-hero but through most of the film, an unlikeable anti-hero. That is not very normal. Jean Peters gave a so-so performance as the hooker with the heart of gold. That great character actress Thelma Ritter shines as the stool-pigeon.The plot had its fair share of twists and turns, wisecracks and tough talk. There is a fight scene near the end of the movie (in the subway station) that was pretty gritty and exciting.I think noir fans (like myself) will enjoy this film. For non-noir viewers, it may seem a little dated and the whole Commie thing a tad overdone.