The Public Enemy showcases James Cagney's powerful 1931 breakthrough performance as Powers--but only because production chief Darryl F. Zanuck made a late casting change. When shooting began, Cagney has a secondary role but Zanuck quickly recognized that Cagney dominated the screen and gave him the star part. From that moment, an indelible genre classic and an enduring star career were both born. Bristling with '20s style, dialogue and desperation under the masterful directorial eye of William A. Wellman,The Public Enemy is a virtual time capsule of the Prohibition era. It's taut, gritty, hard-hitting--even at breakfast when grapefruit is served.