Stephen tries out for the U.S. curling team, and Erick Erickson opposes the RNC's purity test.

The military responds to the underwear bomber, and Riley Crane wins a contest to find 10 balloons.

The Senate and House debate health care, and Charles Moore discovers a floating patch of garbage.

America executes fewer prisoners, and James Fowler talks about the power of social networks.

Eugene Jarecki speaks out against large banks, and Morgan Freeman says untrustworthy things.

Obama won't admit we're in the middle of a war, and Raj Patel talks about "The Value of Nothing."

Stephen examines the "Avatar" controversy and talks to John Heilemann about "Game Change."

Americans walk away from their mortgages, and Stephen talks to Kathleen Sebelius.

Stephen wants to dig for coal, and Emily Pilloton uses industrial design to help the world's needy.

Stephen attempts to make an Olympic team, and Stephen Bosworth talks about North Korea.

Stephen races speedskater Shani Davis and overcomes adversity to interview Dick Ebersol.

Stephen reviews Obama's first year in office, examines airport terrorism and discusses national security with John Farmer, dean of Rutgers-Newark Law School.

An unlikely candidate emerges for a New York Senate seat, and Kati Marton discusses communist Hungary.

Paul Begala urges Democrats to fight back, and Mika Brzezinski balances work with parenting.

Stephen demands an iPad and hopes Arthur Benjamin tells him what comes after 14.

Stephen praises Bob McDonnell's speech, and David Gergen examines the State of the Union address.

Stephen wins a Grammy, and Harold Ford Jr. defends his new support for gay marriage.

Stephen pays tribute to J.D. Salinger, and Eliot Spitzer is happy to see Obama tough on Wall Street.

Stephen has advice for getting America back to work, and John Durant wants us to live like cavemen.

A former CIA agent makes startling revelations, and Henry Louis Gates, Jr. analyzes Stephen's DNA.

Sarah Palin writes notes on her hand, and Jonathan Safran Foer urges Americans to eat less meat.

Chris Dodd wants to take away corporate free speech, and George Stephanopoulos drinks a Heineken.

Stephen profiles Chicago's 5th district, and Claire Danes discusses her role as Temple Grandin.

Al Michaels considers an Al Qaeda bobsled team, and Stephen unveils his Vancouver poster to David Ross.

Stephen offends Ujjal Dosanjh and invites Shaun White for a Canadian beer.

Lindsey Vonn discusses her Austrian cheese remedy, and Bob Costas doesn't care who wins.

Scott Hamilton discusses figure skating, while Ryan St. Onge and Jeret Peterson face an intervention.

Shani Davis thanks the Colbert Nation for his medals, and Seth Wescott refuses to wear tight clothing.

Michael Buble sings two national anthems, and Don Cheadle considers doing heroin for Darfur.

Kids may be the key to our economic future, and David Brooks discusses moderate conservatism.

Scheherazade Rehman debates Greece's economy, and Garry Wills says the president has too much power.

Iraqi candidates sway voters with gifts, and Barry Schwartz explains the downside of too many choices.

Ezra Klein details the reconciliation process, and Tom Hanks discusses his role as a history maker.

Pringles recalls its two best flavors, and Annie Leonard says Americans have too much stuff.

Charlie Cook discusses health care reconciliation, and Sean Carroll talks about the mystery of time.

Scott Rasmussen interprets poll results, and David Aaronovitch discusses conspiracy theories.

Stephen questions the media's focus and asks Robert Baer if the squirrel is in the basket.

Stephen examines the way Americans eat and talks to Rebecca Skloot about the ethics of science.

Doctors offer vasectomy deals for March Madness, and Stephen arm-wrestles Nell Irvin Painter.

James Martin defends social justice, and Mary Matalin tries to avoid Republican talking points.

Stephen breeds the elderly in captivity, and Claire McCaskill sends a message to Rush Limbaugh.

Scandal rocks the church even harder than Creed, and Simon Johnson thinks banks have too much power.

The federal government raids an anti-government militia, and Craig Mullaney discusses Afghanistan.

David Frum gets fired from the Republican cult, and Judith Shulevitz discusses the Sabbath.

Fox cancels "24," and Dean Kamen talks about his new advanced prosthetic arm invention.

Scrabble changes its rules to allow proper names, and Al Sharpton fights for education reform.

Jeff Goldblum blesses a cigarette, and David Simon talks about his new show, "Treme."

Tonight Stephen welcomes astrophysicist and the director of the Hayden Planetarium, Neil DeGrasse Tyson

Tonight Stephen welcomes the founder of Wikileaks, Julian Assange. Also, Stephen talks with Jeffrey Toobin about the replacement of Supreme Court Justice John Paul Stevens.

Tonight Stephen welcomes New York Times journalist Jon Mooallem.

Tonight Stephen welcomes athlete, actress and activist Aimee Mullins

Tonight Stephen welcomes political pundit George Will. Also, Stephen talks with New York Times financial columnist Andrew Ross Sorkin

Tonight Stephen welcomes the chief executive of Dreamworks animation, Jeffrey Katzenberg.

Tonight Stephen welcomes Oregon State University's basketball coach and author of A Game of Character: A Family Journey from Chicago's Southside to the Ivy League and Beyond, Craig Robinson.

Tonight Stephen welcomes musical group Gorillaz.

Tonight Stephen welcomes singer Sharon Jones and the Dap Kings.

Tonight Stephen welcomes the co-author of The Dangerous Book of Heroes, Conn Iggulden.

Tonight Stephen welcomes the contributing editor for the Atlantic Monthly and author of Sonic Boom: Globalization at Mach Speed, Gregg Easterbrook.

Tonight Stephen welcomes the band Ok Go. Also, Stephen talks with California's Lt. Governor Abel Moldonado about Proposition 14.

Tonight Stephen welcomes Harvard law professor Elizabeth Warren. Also, Stephen talks with the president of the Salt Institute Lori Roman and the executive director of the Center for Science in the Public Interest Michael Jacobson about salt intake regulation.

Tonight Stephen welcomes explorer, biologist and author of Adventures among Ants: A Global Safari with a Cast of Trillions, Mark Moffett. Also, Michael J. Fox interrupts the Word so that Stephen can sell his new book.

Tonight Stephen welcomes the founder of StoryCorps and author of Mom: A Celebration of Mothers from StoryCorps, David Isay.

Tonight Stephen welcomes environmentalist and author of Whole Earth Discipline: An Ecopragmatist Manifesto, Stewart Brand. Also, Stephen talks with The Atlantic Monthly columnist Andrew Sullivan about the British elections.

Tonight Stephen welcomes the former Governor of New Mexico Gary Johnson, Also, Stephen talks with George Washington University's Scheherazade Rehman about the Greek bailout.

Tonight Stephen welcomes historian and author of Hellhound on His Trail: The Stalking of Martin Luther King, Jr. and the International Hunt for His Assassin, Hampton Sides. Also, Stephen talks with Slate's legal correspondent Dahlia Lithwick about Elena Kagen's Supreme Court nomination.

Tonight Stephen welcomes self help guru and author of The Shadow Effect: Illuminating the Hidden Power of Your True Self, Deepak Chopra.

Tonight Stephen welcomes the band The Hold Steady.

Manned spaceflight nears its end, and Ayaan Hirsi Ali lives under a constant death threat.

Stephen shows shocking footage from Spain, and Lisa Miller spends seven minutes in Heaven.

Stephen visits the offices of Consumer Reports, and Vampire Weekend performs.

Stephen fundraises for a worthy cause, and Jonathan Alter discusses President Obama's first year.

Stephen visits the Consumer Reports labs, and Mark Frauenfelder plays his cigar-box guitar.

Michael Oren defends Israel's flotilla raid, and Sam Nunn warns of the nuclear terrorism threat.

Marc Fisher debates soccer with Mark Starr, and Alan Bean shows off his moon dust paintings.

Stephen recaps the Tony Awards, and Stephen Prothero is going to Hell in seven religions.

Stephen has to stop hunting men and wants Carl Safina to change the color of his Blue Ocean Institute.

Stephen gives a short, self-indulgent update on Twitter, and Devo performs.

Stephen helps Bob Inglis win in South Carolina, and David Mamet discusses the dying theater.

Stephen interviews for an astronaut position, and Wes Moore discusses the imprisoned Wes Moore.

Stephen starts his astronaut training, and Gloria Steinem discusses the benefits of men raising kids.

Stephen asks if Glenn Beck is a civil rights hero and talks to Tim Westergren about Pandora.

Stephen completes astronaut training, and Michael Specter discusses the dangers of denying science.

Michael Hastings discusses Rolling Stone article, and John Waters supports childhood rebellion.

BP puts a positive spin on the oil spill, and Stephen interviews Mayor Julian Castro.

Stephen plays one-on-one with Allan Houston, and Nicholas Carr criticizes the Internet.

Texas Republicans want to criminalize homosexuality, and Manny Howard turns his backyard into a farm.

Stephen joins Cindy Cohn on the Internet and talks to Michio Kaku about invisibility cloaks.

Writer Garret Keizer talks about his new book: "The Unwanted Sound of Everything We Want: A Book About Noise"

Actor and old friend Steve Carell faces off against Stephen Colbert

Arturo Rodriguez, president of the United Farm Workers of America talks with Stephen about immigrant workers.

Stephen downloads the solution to stop media piracy, and Hephzibah Anderson talks about her year without sex.

Stephen questions the mission in Afghanistan and challenges Kevin Kline with Shakespeare.

President Obama blows off the Boy Scouts, and Elon Musk discusses the future of electric cars.

Bill O'Reilly issues a rare apology, and Stephen pours Andy Cohen a cocktail.

Stephen previews the 2012 Olympics in London, and Jimmy Cliff performs.

Stephen reads some of Barack Obama's private musings to Laura Ingraham.

P.K. Winsome introduces Nielsen Mandela, and Michael Posner discusses international democracy.

Californians can now legally marry their pot plant, and Savion Glover performs.

Stephen names his Alpha Dog of the Week, and talks to Dylan Ratigan about Wall Street.

Michelle Obama vacations in Spain, and David Finkel describes the Iraq War's effect on American troops.

Stephen checks in on the state of America's seniors and talks to Chuck Close about art.

Richard Clarke wants a smaller intelligence community, and John Fetterman revitalizes Braddock, PA.

Stephen examines the meat industry and asks Barry Levine about his National Enquirer file.

Laura Schlessinger gets in trouble, and Thomas French explains what it takes to build a zoo.

Stephen finds out if there's still BP oil in the Gulf, and talks to Jon Krakauer about glory.

President Obama must prove he's not Muslim, and Leslie Kean calls for an investigation of UFOs.

Stephen examines Internet privacy and talks to Jeffrey Goldberg about conflict in the Middle East.

Andrew Hacker dismisses for-profit colleges, and Heidi Cullen warns of extreme weather

Glenn Beck re-founds America, and Richard Engel talks about the end of Operation Iraqi Freedom.

The Tea Party wins midterm primaries, and Anthony Romero celebrates the ACLU's anniversary.

Stephen kicks off his salute to the troops tonight with appearances by the Vice President of the United States and the general who shaved his head.

David Petraeus honors the Colbert Nation, while Brent Cummings and Josh Bleill talk about their tours.

Lisa Birnbach released "The Official Preppy Handbook" in 1980. Who'd have thought that 30 years later, we'd still have preppies but not books.

Stephen solves the Ground Zero mosque crisis and listens to Sean Wilentz mumble about Bob Dylan.

The Tea Party wins the Republican primaries, and Saul Griffith tries to solve global warming.

Stephen announces his March to Keep Fear Alive and talks to Lawrence O'Donnell about Tea Partiers.

A 106-year-old woman shares her secret to long life, and Pavement reunites after 11 years.

Craigslist shuts down its adult services, and Google CEO Eric Schmidt searches for himself.

President Obama gives a back-to-school speech, and Guillermo del Toro meets Stephen del Matador.

Stephen concludes his migrant farm worker training and talks to Oscar Goodman about Las Vegas.

The GOP blocks the repeal of "don't ask, don't tell," and Ken Burns talks about "The Tenth Inning."

Democratic voters suffer from apathy, and Stephen doubts if Ross Douthat is that conservative.

The koala population suffers from Chlamydia, and Steven Rattner discusses the auto industry bailout.

Stephen questions poll reliability and talks to Aaron Sorkin in the hall while people hand them stuff.

The Tea Party reaches out to kids, and Eugene Robinson discusses the four groups of black America.

Stephen looks at the Mexican drug war, and Leon Botstein wants to eliminate two years of school

The government tries to take control of America's food, and Mavis Staples and Jeff Tweedy perform.

Joseph Califano debates Gary Johnson over Prop 19, and Davis Guggenheim addresses failing schools.

Muslims might take over the food supply, and Robert Reich talks about the future of the U.S. economy.

Schools find a new way to raise money, and M. Night Shyamalan isn't really here.

Stephen questions whether it's fair to tax the rich, and Austan Goolsbee gives Obama economic advice.

Stephen gives away free bus tickets to D.C., and Bill Bryson talks about sex in the Middle Ages.

Stephen celebrates his fifth anniversary, and Nicholas Negroponte gives laptops to poor children.

Stephen prepares for the apocalypse, and Garry Wills writes a book about himself.

Stephen looks at the Democrats' chances in the midterms and gives Apolo Ohno a regret.

The McRib returns on election day, and Maira Kalman falls in love with Abraham Lincoln.

Christine O'Donnell prays, and Jonathan Alter says Obama's allergy to gimmickry has hurt him.

Stephen covers the change sweeping through America with a live broadcast.

Californians decide on Prop 19, and Doris Kearns Goodwin puts the midterm election into perspective.

A popular children's TV character is outed, and Elvis Costello threatens to cut off Stephen's thumbs.

Rand Paul wants to protect the rich, and Reza Aslan wants to bring down democracy through art.

Stephen promises to lob softball questions at George W. Bush, and Cee Lo Green performs.

Michelle Obama shakes hands with a conservative Muslim, and Stephen cooks for Martha Stewart.

Wall Street hands out record bonuses, Nintendo goes to court, and Quincy Jones wants a Latin Grammy.

Jeffrey Goldberg opposes full-body scanners, and David Stern misses short shorts.

Stephen looks at the new trend in alcoholic energy drinks, and John Legend performs "Shine."

Stephen wonders if America can trim its national debt, and Ian Frazier talks about Siberia.

Joseph Gobbles shoots Jay the Intern, and Salvatore Giunta credits the bravery of American troops.

The advice columnist and Colbert Report national spokes-gay returns to talk about his new anti-suicide initiative for gay teenagers.

James Rubin discusses the WikiLeaks document dump, and Tom Vilsack brings a cheddar cheese head.

The former education commissioner talks about her efforts to reform the Washington D.C. school system.

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Obama tries to win over Republicans, and Garry Trudeau looks back on 40 years of "Doonesbury."

Obama extends the Bush tax cuts, and David and Julie Eisenhower recall growing up in the White House.

Stephen tests Steve Martin's art knowledge and tries to sell him last year's portrait.

William Wegman arts up Stephen's portrait, and Julie Taymor talks about "The Tempest."

Stephen wants to feed the economy that Jamie Lee Curtis yogurt and asks Patti Smith about her memoir.

Stephen wins the Golden Tweet Award and takes issue with some of Stephen Sondheim's lyrics.

America is at cyberwar, and Laird Hamilton shoots the curl of Stephen's rage.

Jesus may be a liberal Democrat, Amy Sedaris makes a tie snake, and Paul Simon performs.