A cyborg, identical to the one who failed to kill Sarah Connor, must now protect her ten year old son John from an even more advanced and powerful cyborg.
A human soldier is sent from 2029 to 1984 to stop an almost indestructible cyborg killing machine, sent from the same year, which has been programmed to execute a young woman whose unborn son is the key to humanity's future salvation.
When a man goes in to have virtual vacation memories of the planet Mars implanted in his mind, an unexpected and harrowing series of events forces him to go to the planet for real - or is he?