What a great example of economical film-making, right up there (although in a different genre) with Brief Encounter. Dick Powell, having transitioned very successfully (years prior) from boy crooner to hard-boiled tough guy, plays a narc on the trail of opium. Riveting drama, tightly directed by Robert Stevenson. Almost a docu-drama, but extremely engaging. Excellent support from Signe Hasso, Ludwig Donath, Vladimir Sokoloff, etc. A must-see.