"Criss Cross" (1949)

A very solid film noir with a young Burt Lancaster and Yvonne DeCarlo (yes, Lily Munster) as the story's femme fatale...or is she? Toss in a tense armored car robbery gone awry and Robert Siodmak's cool direction set in the seedier side of '40's L.A. and you've got a very watchable genre piece.