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
T-1000 also not specifically designed to encounter other Terminators and has little knowledge of their diagnostics. This allows the T-800 to take it by surprise. The T-1000 had previously shut the T-800 down, but did not know of the older model's emergency reboot power mode. It is stated in Terminator 3, the T-X was designed with the knowledge necessary to destroy other Terminators and thus diagnostic files of other Terminators was in its internal database. The Special Edition DVD release of "T:2" contains additional scenes in the steel foundry showing that the damaging effects of being frozen, shattered and thawed caused