Not sure why I never saw this movie back in the day... A good first rate sci-fi thriller. Better than any of the sequels. Arnold does a good job and Hamilton is terrific.
Leonard Maltin/Plot synopsis:
In 1984, a human soldier is tasked to stop an indestructible cyborg killing machine, both sent from 2029, from executing a young woman, whose unborn son is the key to humanity's future salvation.