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: 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.

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

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

Tonight: Actor and one of the stars of <I>You, Me and Dupree</I>, Owen Wilson.

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

Tonight: Director of the movie <I>Lady in the Water</I>, M. Night Shaymalan.

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

Tonight: Actor and star of the movie <I>Lady in the Water</I>, Paul Giamatti.

TONIGHT: actor, writer and director of <I>The Groomsman</I>, Ed Burns.

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

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

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

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

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

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.

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

Tonight former Secretary of Defense William Cohen, author of <I>Dragon Fire</I>.

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

Tonight actor and comedian Martin Short.

Tonight actress and star of <I>sherrybaby</I>, Maggie Gyllenhaal.

Tonight former U.S.

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

Tonight comedian Norm MacDonald.

Tonight actor and star of <I>Hollywoodland</I> Ben Affleck.

Tonight actor and star of <I>Jackass Number Two</I>, Johnny Knoxville.

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

Tonight conservative pundit Pat Buchanan.

Tonight comedian Al Franken.

Tonight, former Governor of New Jersey and author of <I>The Confession</I>, Jim McGreevey.

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

Tonight comedian Dennis Miller.

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

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

Tonight comedian and star of <I>Freak Show</I>, David Cross.

Tonight the host of CNN's <I>Lou Dobbs Tonight</I>, Lou Dobbs.

Tonight David Mark, author of <I>Going Dirty: The Art of Negative Campaigning</I>.

Tonight <I>New York Times</I> columnist Frank Rich, author of <I>The Greatest Story Ever Sold: The Decline and Fall of Truth from 9/11 to Katrina</I>.

Tonight actress Amy Sedaris, author of <I>I Like You: Hospitality Under the Influence</I>.

Tonight fromer U.S. Attorney General John Ashcroft.

Tonight NBA superstar LeBron James.

Tonight Ohio State policy analyst and author of <I>Overblown: How Politicians and the Terrorism Industry Inflate National Securty Threats and Why We Believe Them</I>, John Meuller.

Tonight John Oliver talks to people who were wooed in 2004. Also Demitri Martin reports on the clubs at Ohio State.

Tonight comedian and star of <I>Borat</I>, Sacha Baron Cohen.

Combined with The Colbert Report, Dan Rather stops by.

Tonight chairman of the Democratic National Committe, Howard Dean.

Tonight actor and co-star of <I>Stranger Than Fiction</I>, Dustin Hoffman.

Tonight writer, actress and star of <I>30 Rock</I>, Tina Fey.

Tonight former Senator from North Carolina and author of <I>Home: Blueprints of Our Lives</I>, John Edwards.

Tonight former anchor of <I>Nightline</I>, Ted Koppel.

Tonight professor of economics and founder of the Grameen Bank, Muhammad Yumus.

TONIGHT: Rep. Rahm Emanuel, D, Rep-ILL, chair of the Congressional Campaign Committee for 2006 elections.

Tonight's Guest: Musician Tom Waits.

Tonight's guests: Jack Black and Kyle Gass, collectively known as Tenacious D.Black and Gass star in the new film Tenacious D: The Pick of Destiny.

Tonight actor and Broadway star Nathan Lane.

Tonight the director of public policy research at the Genetics Policy Institute and author of <I>Stem Cell War: Inside Stories from the Frontlines</I>, Eve Herold.

Tonight mountain climber and author of <I>No Shortcut to the Top: Climbing the World's 14 Hightest Peaks</I>, Ed Viesturs.

Tonight the editor for <I>Newsweek International</I>, Fareed Zakaria.

Tonight actor and star of <I>Extras</I>, Ricky Gervais.

Tonight the assistant managing editor for the <I>Washington Post</I> and author of <I>Imperial Life in the Emerald City: Inside Iraq’s Green Zone</I>, Rajiv Chandraeskaran.

Tonight Iowa Governor and 2008 Presidential candidate, Tom Vilsack.

Tonight actor and star of <I>Night at the Museum</I>, Ben Stiller.