Leonard, the hero of Christopher Nolan’s Memento, cannot form new memories. This poses something of a problem when you’re trying to find the guy who killed your wife. Her brutal murder is the last thing Leonard remembers, and he has been hunting for the perpetrator ever since. To survive in the present, he has a stack of Polaroids that he uses to identify friends and a carpeting of tattoos on his body, including the words JOHN G RAPED AND MURDERED MY WIFE draped across his collarbones....