Cinematographer Hal Mohr made the best of his locations, more than once pausing the story so the film can drink in its characters being dwarfed by their surroundings...

A wry joke appreciated by Don Siegel in a scrupulous study of the San Francisco topography

... Siegel makes it all about the killers and gives the film a matter-of-fact violence that gives the film a life of its own.

Don Siegel's early masterpiece.