Jacob La Cour

Continuity mistake: During the final truck chase through Baltimore, several traffic lights are seen with lights in them. But all the power was off.

Jacob La Cour

Continuity mistake: In one scene we see the map of the power grid of Eastern Sector shutting down. All sectors are red. A few scenes later we are in Warlock's basement. He has the same map on one of his screens, but there some sectors are red and some are green.

Jacob La Cour

Continuity mistake: McClane's head wounds move around throughout the movie. Especially the two red spots on the left side of his head change colour a lot.

Jacob La Cour