I'm sorry to say that this movie didn't hang together. It was visually and musically perfect, and the central relationship between the Hawke and Law characters was excellent, but the technical side was very faulty. A society that's paranoid about identity testing by DNA, yet always uses the same fingertip for blood samples and takes minimal precautions for urine sampling, so that the hero can easily trick the tests? An exercise tolerance test beatable by faking the heart rate recording (like you could also hide breathing rate and sweating)? A serious congenital heart defect that allows vigorous exercise because the plot requires it? Space missions with astronauts wearing business suits? This is a common problem with SF films: a good idea distorted into some kind of arty allegory because its makers weren't prepared to think through and portray realistically the technical practicalities of its hard-science premise.
