Guests: Chair of the Congressional Oversight Panel Elizabeth Warren, comedienne Wanda Sykes, Family Guy creator Seth MacFarlane , former Governor Eliot Spitzer, and Norah O'Donnell

Guests: President of the Council on Foreign Relations Richard Haass, journalist Chrystia Freeland, political writer Reihan Salam, actress Olivia Wilde, comedian Adam Carolla, comedian Chris Rock

Guests: Actor Sean Penn, journalist Andrew Ross Sorkin, co-founder of the Huffington Post Arianna Huffington, director Michael Moore

Guests: Senator Michael Bennet, actor Hill Harper, former Governor Gary Johnson, Amy Holmes, journalist John Heilemann

Guests: Rep. Dennis Kucinich (D-OH), San Francisco Mayor Gavin Newsom (D), economist Stephen Moore, PoliticsDaily.com editor-in-chief Melinda Henneberger and actor Emile Hirsch

Guests: Journalist and author Christopher Hitchens, journalist Jonathan Capehart, musician Rob Thomas, President of the American Federation of Teachers Randi Weingarten and comedian Jeff Garlin

Guests: Musician Billie Joe Armstrong, chef Alice Waters, and comedian Chris Rock

Guests: Journalist David Remnick, economist Simon Johnson, journalist Laura Flanders, fmr. governor Jesse Ventura, film producer Lawrence Bender

Guests: Rep. Alan Grayson, author Susan Eisenhower, journalist Matthew Continetti, author Richard A. Clarke and via satellite Dr. Jack Kevorkian

Guests: Rep. Anthony Weiner, political commentator Chris Matthews, economist Laura Tyson, author Ross Douthat, politician John Bolton

Guests: Comedian and author Sarah Silverman, novelist Salman Rushdie, business news anchor Alexis Glick, journalist David Frum, historian Alan Brinkley

Guests: Journalist Sebastian Junger, Mayor Cory Booker, columnist John Avlon, author S. E. Cupp, Rep. Darrell Issa

Guests: Economist Nouriel Roubini, author Ayaan Hirsi Ali, radio host Michael Eric Dyson, columnist John Fund, comedian Patton Oswalt

Guests: CEO of EarthEcho International Philippe Cousteau, Jr., senior editor for Newsweek Jonathan Alter, Republican political strategist Patrick Ruffini, philosopher and civil rights activist Dr. Cornel West, author Scott Turow

Guests: Political strategist Paul Begala, journalist Andrew Sullivan, The Nation editor Katrina vanden Heuvel, environmental advocate Van Jones, filmmaker Judd Apatow

Guests: Queen Noor of Jordan, MSNBC host Rachel Maddow, Newsweek editor Jon Meacham, ex-Senate Maj. Leader Bill Frist, director Oliver Stone

Guests: Filmmaker Michael Moore, economist Robert Reich, actor Jon Hamm, journalist Martha Raddatz, Republican strategist Mark McKinnon

Guests: Pat Tillman's brother Richard Tillman, conservative activist Andrew Breitbart, CNN analyst Amy Holmes, Family Guy creator Seth MacFarlane, author and scientist Ann Druyan

Guests: Author Bob Woodward, TIME magazine columnist Joe Klein, philosopher and civil rights activist Dr. Cornel West, co-founder of Huffington Post Ariana Huffington, actor and comedian David Cross

Guests: Evolutionary biologist Richard Dawkins, journalist Andrew Ross Sorkin, conservative commentator S. E. Cupp, comedian P. J. O'Rourke, journalist Joshua Green

Guests: Activist Al Sharpton, columnist Markos Moulitsas, musician John Legend, Dana Loesch, columnist Dan Neil

Guests: Actor George Clooney, film director Rob Reiner, journalist Jake Tapper, political commentator Nicolle Wallace, Levi Johnston

Guests: Former US President Jimmy Carter, comedian Zach Galifianakis, political analyst Lawrence O'Donnell, political strategist Margaret Hoover, journalist Reihan Salam

Guests: Commentator Bill O'Reilly, Rep. Darrell Issa, journalist Fareed Zakaria, comedian Dana Gould, D.C. Mayor Adrian Fenty

Guests: Commentator Mike Huckabee, filmmaker Michael Moore, author Nora Ephron, reporter Jessica Yellin, Rep. Joe Sestak (D-PA)