Unlike some of the time-travel movies I love, like 'Primer' or '12 Monkeys,' 'Looper' is not about time travel. It's about this situation that time travel creates and the people dealing with that situation. So narratively, the big challenge was to have time travel get out of the way.
“If a movie is really working, you forget for two hours your Social Security number and where your car is parked. You are having a vicarious experience. You are identifying, in one way or another, with the people on the screen.”