TONIGHT: Author of The Assassins' Gate : America in Iraq, George Packer!

TONIGHT: Actor, Pierce Brosnan! Also, Jason Jones with "Spear Pressure."

TONIGHT: NY Times reporter and author of State of War, James Risen!

TONIGHT: Star of Finding Comedy in the Muslim World, actor and filmmaker, Albert Brooks!

TONIGHT: CNN's terrorism analyst, Peter Bergen!

TONIGHT: Author of Closed Chambers: The Rise, Fall, and Future of the Modern Supreme Court, Edward Lazarus!

TONIGHT: Documentary film maker, Eugene Jarecki! Also, Rob Corddry with "This Week in God."

TONIGHT: Author of My Year in Iraq: The Struggle to Build a Future of Hope and former Head of Coalition Provisional Authority in Iraq, L. Paul Bremer!

TONIGHT: Former CIA Director, James Woolsey!

TONIGHT: Actor and star of Glory Road, Josh Lucas! Also, Nate Corddry with an American Resolution.

TONIGHT: Author of Rebel-in-Chief: How George W. Bush Is Redefining the Conservative Movement and Transforming America, Fred Barnes!

TONIGHT: Author of No god but God: The Origins, Evolution, and Future of Islam, Reza Aslan!

TONIGHT: Actor and star of The World's Fastest Indian, Anthony Hopkins! Plus "New Year's Resolution" with Ed Helms!

TONIGHT: Author of American Vertigo: Traveling America in the Footsteps of Tocqueville, Bernard-Henri Levy!

TONIGHT: Judge on American Idol, Randy Jackson!

TONIGHT: Retired NBA Star, Charles Barkley!

TONIGHT: Author and historian, Michael Beschloss!

TONIGHT: Author of No Place to Hide: Behind the Scenes of Our Emerging Surveillance Society, Robert O'Harrow, Jr.! Plus, "New Year's Resolution" with Dan Bakkedahl!

TONIGHT: Former Assistant Defense Secretary for Public Affairs, Torie Clarke! Plus, Rob Corddry with "This Week In God!"

TONIGHT: Actor and star of Firewall, Harrison Ford! Also, the first installment of "Klassic Kolbert."

TONIGHT: Actor and star of Arrested Development, Will Arnett!

TONIGHT: Astronaut, Mike Mullane!

TONIGHT: Author of A Thousand Barrels a Second: The Coming Oil Break Point and the Challenges Facing an Energy Dependent World, Peter Tertzakian!

TONIGHT: Actress and star of Freedomland, Julianne Moore! Plus, "Trendspotting" with Demetri Martin.

TONIGHT: Actor and star of Winter Passing, Ed Harris! Plus, Lewis Black with "Back in Black."

TONIGHT: Author of Assassination Vacation, Sarah Vowell! Also, Nate and Rob Corddry with "Brother vs. Brother."

TONIGHT: Actor and star of Lost, Matthew Fox!

TONIGHT: Movie critic, Roger Ebert! Also, Lewis Black with "Back in Black."

TONIGHT: The author of The Winds of Change: Climate, Weather, and the Destruction of Civilizations, Eugene Linden!

TONIGHT: Musician and composer, Neil Young!

TONIGHT: The author of Impostor: How George W. Bush Bankrupted America and Betrayed the Reagan Legacy, Bruce Bartlett!

TONIGHT: The author of Infamous Scribblers: The Founding Fathers and the Rowdy Beginnings of American Journalism, Eric Burns!

TONIGHT: The author of Misquoting Jesus: The Story Behind Who Changed the Bible and Why, Bart Ehrman! Plus "This Week in God" with Rob Corddry.

TONIGHT: Actress and star of V for Vendetta, Natalie Portman!

TONIGHT: Actor and star of Find Me Guilty, Vin Diesel!

TONIGHT: Actor and star of Inside Man, Clive Owen!

TONIGHT: Author of Saddam's Secrets: How an Iraqi General Defied And Survived Saddam Hussein, General Georges Sada! Also, "Trendspotting" with Demetri Martin!

TONIGHT: Wisconsin Senator, Russ Feingold!

TONIGHT: Author of The Case For Goliath: How America Acts As The World's Government in the Twenty-first Century, Michael Mandelbaum

TONIGHT: Author of Cobra II : The Inside Story of the Invasion and Occupation of Iraq, Michael Gordon!

TONIGHT: Newsweek International editor, Fareed Zakaria!

TONIGHT: Actress and star of Ice Age: The Meltdown, Queen Latifah!

TONIGHT: Actress and star of Basic Instinct 2, Sharon Stone!

TONIGHT: Actor and podcast host of "The Ricky Gervais Show", Ricky Gervais! Also, Ed Helms with "This Week In God".

TONIGHT: Broadcaster and author of "And They All Sang: Adventures of an Eclectic Disc Jockey", Studs Terkel! Also, Senator John McCain stops by to defend his decision to talk in front of Liberty University students.

TONIGHT: Retired Marine General and author of "The Battle for Peace: A Frontline Vision of America's Power and Purpose", Gen. Tony Zinni!

TONIGHT: Actor and star of Lucky Number Slevin, Josh Hartnett! Also, Dan Bakkedahl learns about "Beach Ploys".

TONIGHT: The author of American Gospel: God, the Founding Fathers, and the Making of a Nation, Jon Meacham! Also, Ed Helms travels to Alaska to find out about the enormous population of bald eagles in one small town.

TONIGHT: The author of Eat This Book: A Year of Gorging and Glory on the Competitive Eating Circuit, Ryan Nerz!

TONIGHT: Actor and star of American Dreamz, Dennis Quaid!

TONIGHT: Senator from Massachusetts, Sen. Ted Kennedy! Also, Jason Jones with Not In Your Front Yard.

TONIGHT: The author of Man in the Shadows: Inside the Middle East Crisis with a Man Who Led the Mossad, Efraim Halevy!

TONIGHT: The author of Man in the Shadows: Inside the Middle East Crisis with a Man Who Led the Mossad, Efraim Halevy!

TONIGHT: Wall Street Journal editor, Kimberley Strassel!

TONIGHT: Actor and star of R.V., Robin Williams!

TONIGHT: The author of The K Street Gang: The Rise and Fall of the Republican Machine, Matthew Continetti!

TONIGHT: The author of The Mighty and the Almighty: Reflections on America, God, and World Affairs, Madeleine Albright!

TONIGHT: The author of Open Target: Where America Is Vulnerable To Attack, Clark Kent Ervin!

TONIGHT: Actor John Malkovich!

TONIGHT: The author of Reporting: Writings from the New Yorker, David Remnick!

TONIGHT: Author of The U.N. Exposed: How the United Nations Sabotages America's Security and Fails the World, Eric Shawn!

TONIGHT: Stand-up comedian Billy Connolly!

TONIGHT: Author of America at the Crossroads: Democracy, Power, and the Neoconservative Legacy, Francis Fukuyama!

TONIGHT: The Chairman of the Democratic National Committee, Howard Dean!

TONIGHT: Actor and star of Rescue Me, Denis Leary!

TONIGHT: A senior editor for National Review, Ramesh Ponnuru! Plus, Lewis Black: Back in Black.

TONIGHT: Legendary country musician and performer of You Don't Know Me: The Songs of Cindy Walker, Willie Nelson!

TONIGHT: Caroline Kennedy, founder of the Profiles In Courage Award.

TONIGHT: Former Secretary of Education and author of America, Bill Bennett.

TONIGHT: Actress Bonnie Hunt from the movie Cars. Plus, Lewis Black reports in Back in Black!

TONIGHT: Legendary comedian Lily Tomlin!

TONIGHT: The author of The World Is Flat: A Brief History of the Twenty-first Century, Thomas L. Friedman!

TONIGHT: The chair of the Republican National Committee, Ken Mehlman!

TONIGHT: The Host of NBC's Meet the Press and the author of Wisdom of Our Fathers: Lessons and Letters from Daughters and Sons, Tim Russert!

TONIGHT: The star of the new series Lucky Louie, Louis C.K.!

TONIGHT: American journalist, humorist, and author of Messages from My Father!, Calvin Trillin!

Tonight: Washington Post reporter Juliet Eilperin, author of Fight Club Politics: How Partisanship is Poisoning the House of Representatives.

TONIGHT: Host of CNN's Anderson Cooper: 360, Anderson Cooper.

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Tonight former U.S. Marine and co-author of Warlord: No Better Friend, No Worse Enemy, Illario Pantano.

Tonight: Former Nixon legal counsel and author of Conservatives Without Conscience, John Dean.

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Tonight: Actor and one of the stars of You, Me and Dupree, Owen Wilson.

Tonight: Gordon Chang, author of Nuclear Showdown: North Korea Takes On The World.

Tonight: Director of the movie Lady in the Water, M. Night Shaymalan.

Tonight: The author of American Bee: The National Spelling Bee and the Culture of Word Nerds, James Maguire.

Tonight: Actor and star of the movie Lady in the Water, Paul Giamatti.

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TONIGHT: actor, writer and director of The Groomsman, Ed Burns.

TONIGHT: Defense reporter and author of Imaginary Weapons: A Journey Through the Pentagon's Scientific Underworld, Sharon Weinberger. Also, Lewis Black in "Back in Black.

TONIGHT: NYU Professor, Dr. Alon Ben-Meir.

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TONIGHT: Professor of Middle East and South Asia politics and author of The Shia Revival: How Conflicts within Islam Will Shape the Future, Vali Nasr.

TONIGHT: Writer and director of the documentary Who Killed The Electric Car?, Chris Paine.

TONIGHT: Actor and star of It's Always Sunny In Philadelphia, Danny DeVito.

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TONIGHT: Famous NASCAR driver Dale Earnhardt Jr.

TONIGHT: The author of Fiasco: The American Military Adventure in Iraq, Thomas E. Ricks.

TONIGHT: The star of the movie Snakes on a Plane, Samuel L. Jackson.

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Tonight, author and scholar of comparative religions, Reza Aslan.

Tonight former Secretary of Defense William Cohen, author of Dragon Fire.

Tonight Frederick Lane, author of The Decency Wars: The Campaign to Cleanse American Culture.

Tonight actor and comedian Martin Short.

Tonight actress and star of sherrybaby, Maggie Gyllenhaal.

Tonight former U.S.

Tonight political advisor and author of Winning Right: Campaign Politics and Conservative Policies, Ed Gillespie.

Tonight comedian Norm MacDonald.

Tonight actor and star of Hollywoodland Ben Affleck.

Tonight actor and star of Jackass Number Two, Johnny Knoxville.

Tonight founder of Sweet Pea Films and producer of the documentary Mr. Conservative: Goldwater On Goldwater, CC Goldwater.

Tonight conservative pundit Pat Buchanan.

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Tonight comedian Al Franken.

Tonight, former Governor of New Jersey and author of The Confession, Jim McGreevey.

Tonight Mississippi Senator Trent Lott, author of Herding Cats: A Life in Politics.

Tonight comedian Dennis Miller.

Tonight the President of the Eurasia Group and author of The J Curve: A New Way To Understand Why Nations Rise And Fall, Ian Bremmer.

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Tonight former Secretary of State and author of Work Hard, Study...