Notorious (1946)

Continuity mistake: Watch Devlin's hands in the cafe in Rio. They open and close between shots.

Revealing mistake: When CG and IB are on the plane, watch the scenery in the window. It appears to be going in reverse.

Plot hole: During the wine cellar scene, Devlin & Huberman are kissing & Sebastian catches them & confronts them. Sebastian then tells Huberman to go to her guests. There is no way that Devlin, who loves Huberman, would not automatically go to Prescott & tell him to immediately pull Huberman from the Sebastian house. Her cover is compromised & her life is in danger! Sebastian saw them both near the wine cellar & will now go to the wine cellar to get the wine (that's why he was down there). He will see that the key is missing. Sebastian is not stupid; he will do the math. If nothing else, Devlin should tell Huberman to not, under any circumstance, put the key back on Sebastian's keyring, since this will prove Huberman's guilt to Sebastian. But neither Prescott nor Devlin say a thing to Huberman (which is understandable in Prescott's case - he doesn't love her - but not Devlin). Devlin is a spy. He should have, & would have, known better.

Trivia: Leopoldine Konstantin plays Claude Rains' mother in the movie, even though in real life she was only three years older than him.

Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen getting a glass of champagne from the bartender at the party in Alexander Sebastian's mansion.

Alexander Sebastian: I'm not afraid to die.
Devlin: You've got your chance, here and now.

Alicia: Don't ever leave me.
Devlin: You'll never get rid of me again.
Alicia: Never tried to.

Devlin: Don't you need a coat?
Alicia: You'll do.