Come closer . . . I'm going to tell you an astounding story . . .
The Maltese Falcon is, like Double Indemnity, one of the sources and pillars of film noir as style and genre. Even in the trailer you can see another of the hallmarks of film noir: Deception, duplicity, lies, and deceit. The typical film noir not only appears cynical and "dark," it unravels a complex plot in which nothing is as it first appears. (This may be another reason why retrospective narration is common in film noir.)
At the heart of the mystery, spinning out webs of deceit, there always seems to be a woman.
Mary Astor as Brigid O'Shaugnessy is one of the great deceitful femmes fatales of noir.
Sam: Was there any truth at all in that whole story?
Brigid: Some . . . not very much.