CNN Original Series examines the historic influence of comedy in an eight-part documentary. Archival footage and contemporary interviews with comedy legends, scholars and current stars combine to explore what makes people laugh and how comedy has affected history's social and political landscape. Judd Apatow, Sarah Silverman, Margaret Cho, Jimmy Kimmel, Kathy Griffin, George Lopez, Keegan-Michael Key, Conan O'Brien, Patton Oswalt and Dick Cavett are among those interviewed.