Continuity mistake: In Joe Brody's apartment Marlowe says to Lauren Bacall, "Don't argue with the man, do as he says, sit down". She sits down on the right side of the couch next to the pillow and never moves from that spot, but several shots later in a wide shot she's sitting in the center of the couch. (00:50:00)????
Continuity mistake: Marlowe sits in front of The Randall Arms Apartments as Lauren Bacall drives up and parks across the street near his car. He tries to hide his face by putting his hand in front of his mouth and in the first shot the top of his hand is covering his mouth but in the next shot the palm of his hand is covering his mouth. (00:47:35)????
Continuity mistake: Marlowe walks into the apartment and Joe Brody pulls a gun on him. Joe holds the gun in his right hand and his cigarette in his left, and we see the smoke from the cigarette rising into the air. In the next three shots the smoke has disappeared, then the next time we see Marlowe and Joe together in a wide shot the cigarette and the smoke are back again. (00:49:10)????
Continuity mistake: When Marlowe pulls his car up in front of the Randall Arms Apartments and waits for Lauren Bacall his windshield has two stickers on the left of it. A few shots later after Lauren pulls up he gets out and follows her into the building. The car he's sitting in has changed as we see the shadow of the windshield on the front seat and there are now three stickers on this windshield. (00:47:15)????
Continuity mistake: Eddie Mars is twirling the key to Geiger's house around his right index finger, but when Marlowe says, "Oh, that's too bad, you got a better one?" and we see him from a different angle he's not doing it. Then in the next shot before he finds the blood stain on the carpet, he's doing again. (00:43:25)????
Continuity mistake: Marlowe says to Lauren Bacall as she sits on his desk, "Then outside of what the woman said, you don't know any reason why they want five thousand dollars for it?". Lauren Bacall's right leg is higher than her left leg but then in the next shot they're reversed and her left leg is higher than her right. (00:34:30)????