In the new time-travel thriller Looper, Bruce Willis (Mercury Rising) and Joseph Gordon-Levitt (G.I. Joe: The Rise of Cobra) both star as Joe, an assassin who must kill his older self when he comes back from the future. Did that last sentence confuse you? Is Looper one of the best movies of the year? As a service, we ask and answer every question that you could possibly have about Looper.