Yeah, that's what ruined T3 for me. No, you can't postpone Judgement Day because, according to the rules of your own universe, everything is already determined by the time travel paradox. All these robots you keep sending into the past to change it are actually creating the timeline from which you originally sent them. They're maintaining the status quo of the future.
Hang on. No, Sarah Connor thinks she can prevent the future and essentially does at the end of T2 when the guy from Cyberdyne gets killed and the bits of the Terminator get destroyed. So she undoes the inevitability.
It's been a while since I have seen the movie...
Thought the actress was pretty similar to Linda Hamilton, personally. Just younger.
