Looper

It's "Timecop" meets "Back to the Future" when criminals of tomorrow dispose of their enemies by sending them to the past for execution by a "looper". But the game changes when old Joe (Bruce Willis) time travels back to be terminated by his younger self (Joseph Gordon-Levitt). Excellent facial prosthetics help make Gordon-Levitt convincing as the younger looking Joe. Emily Blunt is surprisingly American for her role. The little boy is adorable. This sci-fi action thriller will keep you guessing.

Alien gives it 3 "closing the loop" stars out of 4.