These days, some of the biggest names in television aren't the actors and actresses on the screen, but the men and women behind the camera: Shonda Rhimes, Matthew Weiner, J.J. Abrams, and Joss Whedon, just to name a few. It would seem that the "golden age of television" has given rise to the celebrity showrunner. A new documentary looks at the changing role of the toughest job in television.