Description: In Looper, time travel exists, but it is illegal and only available on the black market. When the mob wants to get rid of someone, they send their target 30 years into the past, where a “looper” – a hired gun, like Joe – is waiting to mop up. Joe is doing good as a looper until the day the mob decides to “close the loop,” sending back Joe’s future self for assassination. (TriStar Pictures)