In 1949, James Cagney returned to Warner Brothers for an update of his early '30s prohibition films. He plays Cody Jarrett, a crazy, mother-fixated killer, like he is one of the most-wanted of the depression. There is a tension between this outlaw throwback, and the modern scientific police methods used to track him down.
This is primarily a gangster film. When Jarrett wants to break out of jail, he doesn't have a hidden map of the building and a plan; he busts out with a gun and improvises. But it has the look of film noir. When Cody comes after his disloyal heavy (Steve Cochran) and unfaithful, degenerate moll (Virginia Mayo), it is as dark as The Big Sleep.
The characters are more nuanced than the pre-code gangster films, and the cops are smarter. It is a genre landmark which marries the punchy gangbusters of the early mob films with the gloomy introspection of post war film noir. And it is as tense and exciting as a thriller.
There's a phenomenal star performance from Cagney, but the support is also superb. Especially Edmond O'Brien as a G Man who goes undercover with the most volatile crook in films, to plan a heist in an oil depot. The incendiary ending when Cagney literally burns up the set is film legend.