Reuters - There's pop culture that can be consumed in bite-size chunks, and then there's pop culture that requires investment. Top 40 singles and sitcoms can generally be enjoyed in a vacuum -- one doesn't need much context to enjoy a poppy beat or a half-hour about the antics of a group of funny friends. But increasingly, there's culture that renders all but the most devoted follower completely baffled unless they know the back story -- think "Lost."