James Cameron Schwarzenegger also returned in his role as The Terminator, but this time as a protector. Unlike Schwarzenegger's character—the T-800 Terminator which is made of a metal endoskeleton—the new villain of the sequel, called the T-1000, is a more advanced Terminator made of liquid metal, and with polymorphic abilities. The T-1000 would also be much less bulky than the T-800. For the role, Cameron cast Robert Patrick, a sharp contrast to Schwarzenegger. Cameron explained, "I wanted someone who was extremely fast and agile. If the T-800 is a human Panzer tank, then the T-1000 is a Porsche." Cameron had originally wanted
Terminator 2: Judgment Day T-800 engage in physical combat and the more advanced model seriously damages and shuts down the T-800. However, unbeknownst to the T-1000, the T-800 brings itself back online using emergency power. The T-1000 nearly kills John and Sarah but the T-800 takes it by surprise and blasts it into a vat of molten steel with an M79 grenade launcher, destroying it. John tosses the arm and CPU of the original Terminator into the vat as well. As Sarah expresses relief that the ordeal is over, the Terminator explains that to ensure that it is not used for reverse engineering it