Guests: Assistant to the President Elizabeth Warren, actor Martin Short, political analyst James Carville, political consultant Mike Murphy, Editor-at-large of Reuters Chrystia Freeland

Guests: Journalist Michael Hastings, politician/businessman David Stockman, political commentator Rachel Maddow, economist Stephen Moore, entrepreneur Russell Simmons

Guests: Former RNC Chairman Michael Steele, NRO host Will Cain, former Canadian PM Kim Campbell, Rep. Jack Kingston (R-GA), comedian D. L. Hughley

Guests: Journalist Mona Eltahawy, director Charles H. Ferguson, conservative columnist John Fund, Rep. Anthony Weiner (D-NY), astrophysicist Neil deGrasse Tyson

Guests: Syndicated columnist Arianna Huffington, philosopher Cornel West, journalist Hooman Majd, MSNBC host Norah O'Donnell, actor Matthew Perry

Guests: PBS host Tavis Smiley, director Kevin Smith, journalist John Heilemann, CNBC host Michelle Caruso-Cabrera, journalist Matt Taibbi

Guests: Novelist T. Coraghessan Boyle, feminist icon Gloria Steinem, Lieutenant Governor Gavin Newsom (D-CA), Washington Post reporter Ezra Klein, actress and comedianne Tracey Ullman

Guests: Rep. Keith Maurice Ellison (D-MN), director Bill T. Jones, Democratic strategist Paul Begala, co-founder of the St. Louis Tea Party Dana Loesch, former congressman Thomas M. Davis (R-VA)

Guests: Actor Richard Belzer, Israeli Ambassador Michael Oren, columnist Dan Neil, author Annabelle Gurwitch, activist Erica Williams

Guests: Investigative journalist Jeremy Scahill, Actress Ellen Page, columnist David Brooks, former Governor Ed Rendell (D-PA), Newsweek Editor-in-Chief Tina Brown

Guests: Senator Bernie Sanders (I-VT), Special Olympics chairman Tim Shriver, director Julian Schnabel, radio host Randy Cohen, commentator Doug Heye

Guests: Pilot Chesley Sullenberger, CNN host Eliot Spitzer, BBC anchor Katty Kay, Daily Beast blogger Andrew Sullivan, comedian Colin Quinn

Guests: Theoretical Physicist Michio Kaku, MSNBC Ed Show host Ed Schultz, ex-RNC Head Michael Steele, ABC News Political Director Amy Walter, author Irshad Manji

Guests: Governor Deval Patrick (D-MA), journalist Laura Flanders, blogger Andrew Breitbart, author Mark McKinnon, director John Waters

Guests: Journalist Peter Bergen, author Michael Eric Dyson, investigative journalist and author Jeremy Scahill, ex-Bush speechwriter David Frum, author Irshad Manji

Guests: Counter-terrorism expert Richard A. Clarke, author Andrew Ross Sorkin, columnist Reihan Salam, MSNBC analyst Michelle Bernard, actor Harry Shearer

Guests: Actor Zach Galifianakis, MSNBC host Dylan Ratigan, journalist Gillian Tett, journalist Reza Aslan, author Amy Chua

Guests: U.S. Secretary of Housing and Urban Development Shaun Donovan, professor Melissa Harris-Perry, former New York Rep. Rick Lazio, journalist Larry King, writer/director Adam McKay

Guests: Former Congresswoman Jane Harman (D-CA), comedienne Janeane Garofalo, columnist Joshua Green, journalist Sharon Waxman, actress Jane Lynch

Guests: Ray Kurzweil, columnist Ross Douthat, Public Notice executive director Gretchen Hamel, pundit Chris Matthews, comedian Kevin Nealon

Guests: Chief Foreign Correspondent for NBC News Richard Engel, columnist David Carr, columnist Michael Smerconish, Republican strategist Susan del Percio, filmmaker Alexandra Pelosi

Guests: Executive Director of Drug Policy Alliance Ethan Nadelmann, Ann Coulter, The Nation editor and MSNBC host Christopher Hayes, historian Amanda Foreman, Chaz Bono

Guests: Sex columnist Dan Savage, Global Editor-at-Large of Reuters Chrystia Freeland, Dallas Mavericks owner and entrepreneur Mark Cuban, comedian Marc Maron

Guests: John Fetterman, DNC Vice-Chair Donna Brazile, Reason.com editor Nick Gillespie, actor John Turturro

Guests: Financial-fraud investigator Harry Markopolos, former New York governor Eliot Spitzer; political strategist Margaret Hoover; FreedomWorks president and CEO Matt Kibbe; and emmy-award winning actor Bryan Cranston.

Guests: Ex-Obama economy adviser Christina Romer, Astrophysicist Neil DeGrasse Tyson, Salon editor-at-large Joan Walsh, Palin biography filmmaker Stephen K Bannon and chef Anthony Bourdain.

Guests: Host of Current TV’s “Countdown with Keith Olbermann” Keith Olbermann, Republican strategist Rich Galen, Fellow at the Eisenhower Institute Jennifer Donahue, author of "The Forever War" Dexter Filkins, actor/comedian Louis C.K.

Guests: Journalist Ron Suskind, musician and activist Tom Morello, co-editor of Deadline Artists: America’s Greatest Newspaper Columns John Avlon, former Representative and Director, President, and CEO of The Woodrow Wilson International Center for Scholars Jane Harman (D-CA), filmmaker Michael Moore

Guests: Reporter Dana Priest, environmental advocate Van Jones, former Governer Jennifer Granholm (D-MI), Family Guy creator Seth MacFarlane, Author Salman Rushdie

Guests: Labor leader Richard Trumka, humorist P.J. O'Rourke, author Jonathan Franzen, Rep. Alan Grayson (D-FL), political commentator Nicolle Wallace.