James Cameron’s slam-bang 1991 sequel-cum-remake brings back Arnold Schwarzenegger as another killing machine from the future. This time his mission isn’t to kill the heroine (Linda Hamilton) but to protect her son (Edward Furlong) from an even more high-tech killing machine (Robert Patrick). To spice things up, Schwarzenegger is dressed as a biker and Patrick as a cop, the latter displaying quicksilver capacities that hark back to the friendly alien force in The Abyss. All the virtues of the originalintelligent postmodernist irony, spiffy special effects, effective action, tons of destruction, and Schwarzenegger in the nonhuman role he was born to playare present here, though when Cameron tries to milk some sentiment out of the personality and fate of his top machine he comes up flat and empty, and the other characters are scarcely more interesting. As a fancy mechanism fueled by the pleasure of watching legions of people and equipment being summarily destroyed, this is pretty hot stuff. Written by Cameron in collaboration with William Wisher. R, 136 min. (JR)