On Dangerous Ground (Warner Archive, Blu-ray) (1952), directed by Nicholas Ray from a script he developed with A.I. Bezzerides and producer John Houseman, opens on the urgent yet fractured dramatic score by Bernard Herrmann, a theme that rushes forward anxiously, pauses with quieter instruments, then jumps again as we watch the nocturnal city streets in the rain through the windshield of a moving car. This is the view of the city as seen by Jim Wilson (Robert Ryan), as an obsessive, tightly-wound police detective who works the night shift on the urban streets of an unnamed city filled with grifters, hookers, and petty crooks. He’s as dedicated as they come—he studies mug shots over his meal before the start of shift—but he has no family, no girl, no hobbies, as a quick survey of his Spartan apartment shows, and his single-minded focus on the job has twisted the compassion out of him. When his anger boils over into violence once too often, he’s sent out of town to help with a murder case in the rural countryside.