Guest Stars Jon Stewart as Himself Michael Stipe as Himself Charlie Rose as Himself Bryan Cranston as Himself Mandy Patinkin as Himself Vince Gilligan as Himself Neil deGrasse Tyson as Himself Toby Keith as Himself Willie Nelson as Himself Bill Clinton as Himself Katie Couric as Herself Henry Kissinger as Himself Jeff Tweedy as Himself Terry Gross as Herself Joe Quesada as Himself Patrick Stewart as Himself Cyndi Lauper as Herself J.J. Abrams as Himself Andy Cohen as Himself Mark Cuban as Himself Sam Waterston as Himself Tom Brokaw as Himself Doris Kearns Goodwin as Herself Bob Costas as Himself Jeff Daniels as Himself Alex Trebek as Himself James Franco as Himself Elijah Wood as Himself Alan Alda as Himself Tim Meadows as Himself George Lucas as Himself Ken Burns as Himself Barry Manilow as Himself Christiane Amanpour as Herself Kareem Abdul-Jabbar as Himself Jon Batiste as Himself Claire McCaskill as Herself Gloria Steinem as Herself Ray Odierno as Themselves Ric Ocasek as Himself Randy Newman as Himself Yo-Yo Ma as Himself Mike Huckabee as Himself Shane Smith as Himself Keith Olbermann as Himself Cory Booker as Himself (Cory A. Booker) Francis Collins as Himself Nicholas Kristof as Himself Samantha Power as Herself David Leonhardt as Themselves David Hallberg as Himself David Gregory as Himself Stone Phillips as Himself Tom Friedman as Himself (Thomas Friedman) Steven Pinker as Himself Pussy Riot as Themselves Paul Krugman as Himself Norman Ornstein as Himself Maureen Dowd as Herself Matt Taibbi as Himself Grover Norquist as Himself Emily Bazelon as Herself Eliot Spitzer as Himself Eleanor Holmes Norton as Herself Dean Kamen as Themselves Bill de Blasio as Himself (Bill De Blasio) Andrew Sullivan as Himself Alexi Lalas as Himself Dan Savage as Himself Arianna Huffington as Herself