If Michael Apted's Up series of documentaries plays like the older, more relaxed brother of reality TV, it's because that's basically what it is. Launched in 1964 as a one-off special of interviews with 7-year-olds in Seven Up by director Paul Almond, the film surveyed 14 kids of various economic backgrounds to explore England's class system (it was based on the repeatedly invoked Jesuit motto "Give me a child until he is seven and I will give you the man"). Apted, who helped cast that film, then took over and has returned to its subjects every seven years to document their lives over time. Though the films are still inherently political, what emerged was less of an economic survey and more one of humanity. Reality TV is often referred to as a sociological experiment, but the Up series is as bona fide of a longitudinal study as pop culture has ever offered.