The British Film Institute...
... just called it the only film with every film-noir trait there is.
http://www.bfi.org.uk/news-opinion/news-bfi/features/infographic-what-makes-film-noir?utm_content=bufferfac78&utm_medium=social&utm_source=twitterbfi&utm_campaign=buffer
Favourite movie of all time: "Star Trek II: The Wrath of Khan"