Comedy greats George Carlin, Richard Pryor, Bill Cosby, Lily Tomlin, Andy Kaufman, Steve Martin and other performers who came into their own in the 1960s and '70s take the stage in this collection of rare vintage performances. The turbulent era ushered in a new style of stand-up, and it's no joke that many of the stars in this collection paved the way for Dave Chappelle, Chris Rock, Borat's Sacha Baron Cohen, Kathy Griffin and others.