T-1000 played Kyle Reese in "The Terminator", in the role with the explanation that Skynet managed to acquire Reese's DNA and use it for a new Terminator. Cameron ultimately dropped this idea after deciding the audience would find it too confusing: eventually casting came down to Robert Patrick, as a deliberate contrast to the original Terminator - Cameron stated "I wanted to find someone who would be a good contrast to Arnold. If the 800 series is a kind of human Panzer tank, then the 1000 series had to be a Porsche." For a more machine-like performance, Patrick had to learn
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