Format: TCM on DVR
Director: Tay Garnett
The Postman Always Rings Twice (1946) is among the top ten films I'd recommend in a "what you need to know about noir" seminar. It's got an earned place among the noir canon, and even though I've read the book and seen it half-dozen times, I find myself thoroughly enjoying every time I return to it. It simply works.
It shares a certain headspace with Double Indemnity, which makes sense as both started as novels by James M. Cain. There's not just a gritty realism in how characters are and behave, it's matched by the worlds Cain created that seem not far off from our own. Roadside diners, insurance offices. Heck, throw in Mildred Pierce and you're in the suburbs and building up comfortable eateries.
All it really takes is infatuation to become an obsession, and everything can go off the rails.