6x73 - Mark Frauenfelder

June 8, 2010

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

6x74 - Amb. Michael Oren, Sen. Sam Nunn

June 9, 2010

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

6x75 - Alan Bean

June 10, 2010

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

6x76 - Stephen Prothero

June 14, 2010

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

6x77 - Dr. Carl Safina

June 15, 2010

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

6x78 - Devo

June 16, 2010

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

6x79 - David Mamet

June 17, 2010

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

6x80 - Wes Moore

June 21, 2010

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

6x81 - Gloria Steinem

June 22, 2010

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

6x82 - Tim Westergren

June 23, 2010

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

6x83 - Michael Specter

June 24, 2010

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

6x84 - Michael Hastings, John Waters

June 28, 2010

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

6x85 - Mayor Julian Castro

June 29, 2010

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

6x86 - Nicholas Carr

June 30, 2010

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

6x87 - Manny Howard

July 1, 2010

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

6x88 - Paul Krugman, Dr. Michio Kaku

July 5, 2010

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

6x89 - Garret Keizer

July 6, 2010

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

6x90 - Steve Carell

July 7, 2010

Actor and old friend Steve Carell faces off against Stephen Colbert

6x91 - Arturo Rodriguez

July 8, 2010

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

6x92 - Hephzibah Anderson

July 26, 2010

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

6x93 - Thomas S. Blanton, Kevin Kline

July 27, 2010

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

6x94 - Elon Musk

July 28, 2010

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

6x95 - Andy Cohen

July 29, 2010

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

6x96 - Jimmy Cliff

August 2, 2010

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

6x97 - Laura Ingraham

August 3, 2010

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

6x98 - Michael Posner

August 4, 2010

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

6x99 - Savion Glover

August 5, 2010

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

6x100 - Dylan Ratigan

August 10, 2010

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

6x101 - David Finkel

August 11, 2010

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

6x102 - Chuck Close

August 12, 2010

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

6x103 - Richard Clarke, John Fetterman

August 16, 2010

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

6x104 - Barry Levine

August 17, 2010

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

6x105 - Thomas French

August 18, 2010

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

6x106 - Jon Krakauer

August 19, 2010

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

6x107 - Leslie Kean

August 23, 2010

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

6x108 - Jeffrey Goldberg

August 24, 2010

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

6x109 - Andrew Hacker, Heidi Cullen

August 25, 2010

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

6x110 - Richard Engel

August 26, 2010

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

6x111 - Anthony Romero

September 7, 2010

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

6x112 - Vice President Joe Biden, Gen. Raymond Odierno

September 8, 2010

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.

6x113 - Sen. Jim Webb, Joshua Bleill, Lt. Col. Brent Cummings, John Legend

September 9, 2010

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

6x114 - Lisa Birnbach

September 13, 2010

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.

6x115 - Sean Wilentz

September 14, 2010

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

6x116 - Saul Griffith

September 15, 2010

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

6x117 - Lawrence O'Donnell

September 16, 2010

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

6x118 - Pavement

September 20, 2010

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

6x119 - Eric Schmidt

September 21, 2010

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

6x120 - Guillermo Del Toro

September 22, 2010

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

6x121 - Oscar Goodman

September 23, 2010

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

6x122 - Ken Burns

September 27, 2010

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

6x124 - Steve Rattner

September 29, 2010

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

6x125 - Aaron Sorkin

September 30, 2010

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

6x126 - Eugene Robinson

October 4, 2010

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

6x127 - Leon Botstein

October 5, 2010

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

6x128 - Mavis Staples and Jeff Tweedy

October 6, 2010

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

6x129 - Davis Guggenheim

October 7, 2010

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

6x130 - Robert Reich

October 11, 2010

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

6x131 - Brendan Steinhauser

October 12, 2010

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

6x132 - Austan Goolsbee

October 13, 2010

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

6x133 - Bill Bryson

October 14, 2010

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

6x134 - Nicholas Negroponte

October 25, 2010

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

6x135 - Garry Wills

October 26, 2010

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

6x136 - Rep. Tom Perriello, Apolo Anton Ohno

October 27, 2010

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

6x137 - Maira Kalman

October 28, 2010

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

6x138 - Jonathan Alter

November 1, 2010

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

6x139 - Katrina vanden Heuvel, David Frum

November 2, 2010

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

6x140 - Doris Kearns Goodwin

November 3, 2010

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

6x141 - Elvis Costello

November 4, 2010

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

6x142 - Reza Aslan

November 8, 2010

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

6x143 - Cee-Lo Green

November 9, 2010

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

6x144 - Martha Stewart

November 10, 2010

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

6x145 - Quincy Jones

November 11, 2010

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

6x146 - David Stern

November 15, 2010

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

6x147 - John Legend

November 16, 2010

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

6x148 - Ian Frazier

November 17, 2010

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

6x149 - Staff Sgt. Salvatore Giunta

November 18, 2010

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

6x150 - Dan Savage

November 29, 2010

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

6x151 - Tom Vilsack

November 30, 2010

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

6x152 - Michelle Rhee

December 1, 2010

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

6x153 - David Stockman

December 2, 2010

6x154 - Garry Trudeau

December 6, 2010

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

6x155 - Julie Nixon Eisenhower & David Eisenhower

December 7, 2010

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

6x156 - Steve Martin

December 8, 2010

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

6x157 - Julie Taymor

December 9, 2010

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

6x158 - Patti Smith

December 13, 2010

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

6x159 - David Boies, Stephen Sondheim

December 14, 2010

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

6x160 - Omar Wasow, Laird Hamilton

December 15, 2010

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

6x161 - Amy Sedaris, Paul Simon

December 16, 2010

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