Multiplicity (1996)

Continuity mistake: When the original Doug brings the concrete worker to fix the house for Laura, Keaton uses a red sweater with a number one on it, and a white t-shirt under; But a couple scenes later, when he is talking to number three Doug and eating a sandwich, the white t-shirt has disappeared.

Doug #2: [seeing Doug #1] Is that it?
Dr. Leeds: No. I'm afraid you're it.
Doug #2: What do you mean? I can't be it. You mean, you think I'm the clone?
Dr. Leeds: That's right.
Doug #2: I can't be the clone, I'm me. He's gotta be the clone.
Doug #1: No, see I'm, I'm me. I'm me. I'm me, right?

Bishop73

Trivia: When Three calls Doug's job to say that Doug is sick, on the day of a building inspection, Michael Keaton uses the same voice that he did in the movie "Beetlejuice." The building inspector is played by Glenn Shadix, who was also in the movie "Beetlejuice."

Azalea