Continuity mistake: Throughout the movie, Cottonmouth Joe's horse changes from a tan Arabian to a black Clydesdale during attack sequences.
Factual error: The opening scene shows Lieutenant Commander Sullivan being interviewed by a Rear Admiral at CINCPAC, according to the signage. He would never be assigned to a submarine scheduled to be deployed to the Atlantic.
Factual error: The garage scientists are setting up an experiment. One of the guys goes to tighten the terminals of a battery. He grabs one in each hand and proceeds to tighten them. If he had done that to a real battery he would have gotten the shock of his life. (00:12:00)
Continuity mistake: During the showdown's sword fight between Lansing and Faisal in the palace hall, there is a far-off shot in which the blade of Lansing's sword can just barely be seen bending off at an unnatural angle, revealing it as a prop. For the rest of the duel, the sword is shown intact. (01:16:44)