Continuity mistake: In the car chase, the right headlight gets knocked out in the dark sedan, but later shots of the chase show both headlights working on all three cars.
Continuity mistake: In the movie theater, the movie on screen is Nosferatu, eine Symphonie des Grauens (1922), but the scenes are not in the correct order.
Continuity mistake: Toward end of the movie when Victor Argo is seen walking through 3 subway cars looking for Christopher Walken, he passes the same man in all 3 subway cars.