Continuity mistake: In the DA's office Marlowe says to Capt. Cronjager, " That's all, I was in a tough spot, I was probably wrong but I wanted to protect my client" and Marlowe's hat is on the DA's desk right next to his left arm. In the next shot an ash tray with a smoldering cigarette is next to his left arm (1945 Version on DVD). (01:04:45)????
Continuity mistake: After taking Carmen Sternwood to her bedroom, Norris the Sternwood's butler helps Marlowe put on his over coat as he prepares to leave. Marlowe wasn't wearing it when he came into the house though and there's no indication that he had it in Carmen's car because when they left Arthur Gwynn Geiger's house he didn't have it on. (00:27:15)????
Continuity mistake: Marlowe goes into Geiger's house again to snoop around and he finds that Geiger's dead body has been removed. As he stands over the spot where the body was his shadow falls right on the bloodspot. In the next shot of him kneeling down and touching the blood stained carpet there's no shadow. (00:28:00)????
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)????