Visible crew/equipment: Randomly, a big moving shadow is cast on the underside of the flight of stairs between Daxter's apartment and the (unseen) second floor when he is unlocking the door of his flat after meeting his landlady that warned him about gas. It does not match Jack Lemmon's motions. (01:37:10)
The Apartment (1960)
1 visible crew/equipment mistake
Directed by: Billy Wilder
Starring: Shirley MacLaine, Jack Lemmon, Fred MacMurray, Ray Walston
Factual error: At the end of the scene where CC Baxter meets the doctor for the first time in the hall, Baxter is standing in the doorway of his apartment as the doctor enters his own apartment. From that view, you can see into Baxter's kitchen, which has a window - right where the apartment the doctor just entered is located. That could not be an outside wall.
J.D. Sheldrake: Ya know, you see a girl a couple of times a week, just for laughs, and right away they think you're gonna divorce your wife. Now I ask you, is that fair?
C.C. Baxter: No, sir, it's very unfair... Especially to your wife.
Trivia: Shirley MacLaine kept improvising, much to the chagrin of the writer and director. She was made to do multiple takes of one sequence because she kept missing a word out.