A Western about relationships, honor, purple light in the canyon, and the inexhaustibly fine line between “good” and “good enough,” RIO BRAVO is just about perfect. John Wayne stars as John T. Chance, a small town sheriff who must keep the peace with a task force that embarrasses his conservative sense of professionalism: drunken deputy Dean Martin, guitar-slinging kid Ricky Nelson, game-legged oldster Walter Brennan, fiercely independent Angie Dickinson, and loquacious Pedro Gonzalez-Gonzalez. An ambling, seemingly shapeless movie that thinks nothing of stopping the action for a song or two, RIO BRAVO boasts a screenplay that is a genuine model of economy and an endless fount of arid wisdom.