High Quality Content by WIKIPEDIA articles! "Greenzo" is the fifth episode of NBC`s second season of 30 Rock and twenty-sixth episode overall. It was written by Jon Pollack and directed by series producer Don Scardino. It aired on November 8, 2007 in the United States. Guest stars in this episode include Kevin Brown, Grizz Chapman, Al Gore, John Lutz, Madison McKinley, Maulik Pancholy, Paula Pell, Dion Sapp, David Schwimmer and Meredith Vieira.