Classic Private Investigator Noir Movie Scene Monologue Cliche

That might be To Have and Have Not or The Maltese Falcon. All of them seem to have that kind of a scene.

Yeah. The Maltese Falcon would get my vote. But that's mostly because I love that flick.

Sorry but for the life of me I can't recall seeing a detective scene in 'To Have and Have Not'. I do believe it is considered Film Noir, however. I can't recall a PI ... or am I out-to-lunch? There's a tense police scene where Harry Morgan is being queried.

Sounds like Sam Spade, but which film?

The most prominent movie hit I can think of featuring Sam Spade was 'The Maltese Falcon''

No internal monologues or voice-overs in either The Maltese Falcon or in The Big Sleep (that's what you're probably thinking of rather than To Have and Have Not, which isn't a detective film - and anyway that doesn't have any internal monologues either). That sort of narration was more suited to radio, which is probably where that trope first originated.

I was probably confusing a Spade with a Hammer.

Private Investigators
Tommy and Tuppence Beresford - created by Agatha Christie
The Continental Op – created by Dashiell Hammett
Phryne Fisher - created by Kerry Greenwood
Garret and the Dead Man - created by Glen Cook
Cordelia Gray - created by P. D. James
Mike Hammer - created by Mickey Spillaine
Sherlock Holmes – created by Sir Arthur Conan Doyle
Thomas Magnum - created for Magnum P. I. TV series (1980-1988)
Joe Mannix - created by Richard Levinson and William Link for Mannix TV series (1967–1975)
Philip Marlowe - created by Raymond Chandler
Adrian Monk – created by Andy Breckman for Monk (TV series) (2002–2009)
Hercule Poirot – created by Agatha Christie
Jim Rockford ­­– created by Roy Huggins and Stephen J. Cannell for The Rockford Files TV series (1974–80)
Sam Spade – created by Dashiell Hammett
Shawn Spencer – created by Steve Franks for Psych (TV series) (2006- )
Spenser - created by Robert B. Parker
Nero Wolfe - created by Rex Stout

'The Thin Man' (1934) detective series by Dashiell Hammett -
starring fictional characters Nick and Nora Charles (actors William Powell and Myrna Loy)

They tended not to be so "noir"...and had more sunlight and happiness than those other "hard ass" films.

I'm pretty sure that this cliche is actually a mashup rather than a direct echo of something that was ever done.

I think it's a wishful cross interpretation of Raymond Chandler novels like 'The Big Sleep' which featured the protagonist's internal monologues, and the movies made of them, which didn't.

http://tvtropes.org/pmwiki/pmwiki.php/Main/PrivateEyeMonologue