On a Saturn space station, Adam and Alex are two scientists seeking new forms of food for the impoverished planet earth. Their idyllic life is interrupted by the arrival of Captain James, a psychopathic maniac from earth who brings with him a 'helper' in the form of a murderous robot who gradually develops a mind of its own.Saturn 3 is an entertaining fusion of sci-fi, horror and suspense culminating in the ultimate battle of man against machine.