Common themes of Film Noir

There are several key themes of Film Noir, all of which must be included in my film in order to portray an authentic Film Noir.

• Voice Overs - These are used to inform the audience of the protaganist's mindthoughts and to identify with the narrator. 
• Truth seeking Protagnosists attempting to escape from a troubled past or shattered background. This is usually a crime such as a murder, which is always on the consciense of the protaganist.
• Femme Fatale, often intertwined with the protaganist through passion. They are usually ruthless and is at ease when immersed in male surroundings.  
• Flashbacks- These are used to show the audience the troubled past's of characters.Normally told by the character themselves, with footage of them contemplating the past.  
• Low key lighting- This creates a sense of suspense and mystery, both themes associated with Film Noir.  
• Cigarrette smoke- Cigarrete smoke is used to create atmostphere and tension.