Visible crew/equipment: In the fight scene on the stairs near the end of the movie, the camera shot looks up and there is a security camera mounted up in the corner.

Continuity: In the scene where Chris O'Donnell and Kiefer Sutherland are riding in the forest together, they are both on white horses. Kiefer Sutherland's white horse gets killed, and he later rides into Calais on a brown horse. In a later scene when the four are riding together to gather all the Musketeers, there are sometimes three white horses and one brown horse, and sometimes there are four white horses.