When Saturday Night Live started, no one ever imagined that a cultural revolution was taking place. From a small, improvisational approach to comedy with the Not Ready for Prime Time Players in 1975, to the mega-entertainment phenomenon that Lorne Michaels built, there has been no single television show with this much impact both artistically and from the business perspective. Entertainment Arts historian David Chack highlights the program's beginnings, what it became through the decades, how it continues, and why.