Justin Timberlake and Amanda Seyfried in In TimeIN TIME

Set in either the distant future or some Bizarro World version of the present, Andrew Niccol's sci-fi thriller In Time imagines an Earth in which time is literally our universal currency; an eight-hour work shift can add a few days to your life span, but a trip to the grocery store will cost you two weeks. (A slowly ticking, neon-green clock embedded in your forearm tells you just how much time you have left to spend.) It's also an Earth in which humans have been genetically engineered to stop aging at 25, and are then allowed one year more before their bodies shut down completely ... unless, of course, they have the proper means, or the proper lack of morals, to buy or steal as much extra time as they want.