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Season 11 Episode
- Season 4 Andrew Sullivan, Richard Freeman
- Season 4 Chris Beam, Gary Rosen
- Season 4 Gov. Mike Huckabee, Matt Taibbi
- Season 4 Norman Ornstein, Muhammad Yunus
- Season 4 Neil Shubin
- Season 4 Peter Hopkins, Jared Cohen
- Season 4 Deborah Tannen
- Season 4 Lou Dobbs, David Levy
- Season 4 Allan Sloan, Eric Weiner
- Season 4 Malcolm Gladwell, Andrew Young
- Season 4 Stephen Colbert's Sport Report
- Season 4 Debra Dickerson, Charles Nesson
- Season 4 Marjane Satrapi, Rick Warren
- Season 4 Joe Quesada, Alex Ross
- Season 4 Carl Hiaasen, Frans de Waal
- Season 4 Tim Harford, Andrew Napolitano
- Season 4 Tony Campolo, Jacob Weisberg
- Season 4 Angelo Falcon, Bob Dole
- Season 4 Richard Brookhiser, Tad Devine
- Season 4 Mark Moffett
- Season 4 Aubrey de Grey, Philip Zimbardo
- Season 4 Gov. Eliot Spitzer, Eleanor Holmes Norton, Lisa Randall
- Season 4 David Gracer, Richard Thompson Ford
- Season 4 John Feinstein, Leonard Nimoy
- Season 4 Henry Louis Gates Jr.
- Season 4 Tony Snow
- Season 4 Richard Brookhiser, Ingrid Newkirk
- Season 4 Lorin Maazel, Shashi Tharoor
- Season 4 William Donohue, Howard Dean, Jennifer 8. Lee
- Season 4 Robert Reich, Gregory Rodriguez
- Season 4 John Legend
- Season 4 George McGovern
- Season 4 Geraldo Rivera
- Season 4 Howard Kurtz
- Season 4 Hussein Ibish, Sudhir Venkatesh
- Season 4 Samantha Power
- Season 4 Carole King
- Season 4 Dee Dee Myers
- Season 4 Dean Kamen
- Season 4 Eric Alterman, Michael Reynolds
- Season 4 Van Jones
- Season 4 R.E.M.
- Season 4 Clay Shirky
- Season 4 Trevor Paglen, Jesse Ventura
- Season 4 Madeline Albright
- Season 4 Jeff Gore
- Season 4 Robin Wright
- Season 4 John Legend, Mayor Michael Nutter, Chris Matthews
- Season 4 Michelle Obama, The Roots
- Season 4 Philadelphia Eagles Cheerleaders, Gov. Ed Rendell
- Season 4 Hillary Clinton, Patrick Murphy, John Edwards, Barack Obama
- Season 4 Fr. James Martin, Sen. Bernie Sanders
- Season 4 Susan Jacoby
- Season 4 Mitch Albom
- Season 4 Maria Shriver
- Season 4 Feist
- Season 4 Anne Lamott
- Season 4 Donna Brazile, Noah Feldman
- Season 4 James Kunstler
- Season 4 Carl Hiaasen
- Season 4 Nathan Gunn
- Season 4 Hasan Elahi, George Johnson
- Season 4 Arianna Huffington
- Season 4 Dr. Mehmet Oz
- Season 4 Jennifer Hooper McCarty
- Season 4 Laura Dern, Grover Norquist
- Season 4 Andrei Cherny
- Season 4 Tony Perkins, Brian Greene
- Season 4 Sen. Claire McCaskill
- Season 4 Tad Devine, David Sirota
- Season 4 Jon Paskowitz
- Season 4 George Will
- Season 4 Rep. Bob Barr, Salman Rushdie
- Season 4 Pat Buchanan
- Season 4 Phil Weiss
- Season 4 Alan Rabinowitz
- Season 4 David Hajdu
- Season 4 Winona LaDuke, Dixon Despommier
- Season 4 Kenneth Miller
- Season 4 Neal Katyal, Jonathan Zittrain
- Season 4 Uma Mysorekar, Junot Díaz / Lexicon Artist
- Season 4 Bishop N.T. Wright
- Season 4 Barbara Ehrenreich
- Season 4 Jason Bond, Will Smith
- Season 4 Paul Goldberger, Neil deGrasse Tyson
- Season 4 Rep. Robert Wexler
- Season 4 Lama Surya Das, Daniel C. Esty
- Season 4 Julia E. Sweig, Jason Riley
- Season 4 Rush
- Season 4 Elizabeth Edwards
- Season 4 Sen. Jim Webb
- Season 4 Lucas Conley
- Season 4 Nas
- Season 4 Laurie Goodstein, Garrett Reisman
- Season 4 Toby Keith
- Season 4 Eric Roston
- Season 4 Crosby, Stills & Nash
- Season 4 Buzz Aldrin
- Season 4 Lucas Conley, The Apples in Stereo
- Season 4 David Carr
- Season 4 Jason Bond, Kevin Costner
- Season 4 Devin Gordon, Thomas Frank
- Season 4 Jorge Ramos
- Season 4 Joey Cheek, Jane Mayer
- Season 4 Dick Meyer
- Season 4 Bing West
- Season 4 Rep. Bob Barr, Scott McClellan
- Season 4 Gov. Mike Huckabee
- Season 4 Richard Brookhiser
- Season 4 John McWhorter
- Season 4 Laura D'Andrea Tyson
- Season 4 Doris Kearns Goodwin
- Season 4 Adam Brickley, Ron Paul
- Season 4 Gov. David Paterson
- Season 4 Peter J. Gomes
- Season 4 Tyson Slocum, Rick Reilly
- Season 4 Robert Lutz
- Season 4 Maria Bartiromo
- Season 4 Jackson Browne
- Season 4 Joe Nocera, Cornel West
- Season 4 Nick Carr
- Season 4 Paul Begala
- Season 4 James Taylor
- Season 4 Dave Levin
- Season 4 Stephen Greenblatt, Naomi Klein
- Season 4 Jim Cramer
- Season 4 Nate Silver
- Season 4 Joe Scarborough
- Season 4 David Gergen, Oliver Stone
- Season 4 Bethany McLean, Kathleen Parker
- Season 4 Joseph Stiglitz
- Season 4 Shai Agassi
- Season 4 Brent Glass, Robert Greenwald
- Season 4 Fareed Zakaria, Wynton Marsalis
- Season 4 Michael Farris
- Season 4 David Frum
- Season 4 Jonathan Alter
- Season 4 Yo-Yo Ma
- Season 4 Brian Moore, Sherman Alexie
- Season 4 David Simon
- Season 4 Wilco
- Season 4 Charlie Cook, Andrew Sullivan
- Season 4 Indecision 2008: America's Choice
- Season 4 Ambassador Andrew Young
- Season 4 Rachel Maddow
- Season 4 Dan Savage, Kevin Johnson
- Season 4 Bob Woodward
- Season 4 Stephen Moore
- Season 4 Malcom Gladwell
- Season 4 Paul Simon
- Season 4 Michael Lewis
- Season 4 Cory Booker, Thomas L. Friedman
- Season 4 Khaled Hosseini, Roland Fryer
- Season 4 Jeffrey Goldberg
- Season 4 Barbara Walters
- Season 4 Sen. Bob Graham, Nicholas Wade
- Season 4 Geoffrey Canada
- Season 4 Kevin Bacon, Charlie Kaufman
- Season 4 Richard Haass
- Season 4 Michael Phelps
The Colbert Report - Season 4 Episode 107 Rep. Bob Barr, Scott McClellan
6.84 24 minutes Tonight Stephen welcomes former White House Press Secretary Scott McClellan, author of What Happened: Inside the Bush White House and Washington's Culture of Deception, Scott McClellan. Also, Stephen talks with former Georgia Representative and Libertarian Presidential candidate Bob Barr about the Libertarian party's "green" efforts.
