Very much enjoyed Detour, surely about as indisputably Noir as you can get: voiceover, flashback, femme (very much) fatale, innocent man led ever further astray, unreliable narrator, lighting...and it goes on.
Ann Savage as Vera was wonderful: she was completely and irredeemably horrible throughout and I loved her for that!! Al Roberts though...what a sap! Am I alone in thinking he got exactly what he had coming to him? He was a weak man, bitter but with an odd sense that the world somehow owed him (the scene where he was justifying his actions in robbing the dead Haskill and stealing his clothes was particularly telling) and also easily led and pushed around, especially by women (note that he really didn't do much but sulk when Susan left him for California at the start).
The other thing that struck me: could we trust his narrative? He told us no-one would believe him that the deaths were accidental and in fact you have to think that could be true, we do only have his word for his innocence after all!