Gov. Ed Rendell
E1
Stephen uncovers a menace in Florida and talks to Ed Rendell about leaving office by choice.
Geoffrey Canada
E2
Some want the dollar to be converted back to gold, and Geoffrey Canada advocates for education reform.
Atul Gawande
E3
America's fruit supply is in danger, and Atul Gawande wants to reduce health risks in hospitals.
Dr. Ronald DePinho
E4
Neil deGrasse Tyson explains how tides work, and Robert DePinho wants to reverse the aging process.
Fen Montaigne
E5
Stephen violates the Constitution, and Fen Montaigne talks about Antarctic penguins.
Chris Hughes
E6
Stephen picks this year's Grammy winners, and Chris Hughes starts a site for Jewish sumo wrestlers.
Bernard-Henri Levy
E7
50 Cent makes $8 million on Twitter, and Bernard-Henri Levy discusses public intellectualism.
Kevin Spacey
E8
Hitler delivers a moving speech in Tucson, and Stephen pictures Kevin Spacey naked with rose petals.
Sherry Turkle
E9
Stephen unveils a new portrait of himself and talks to Sherry Turkle about alienating technology.
Cornel West
E10
Stephen looks at education reform and assumes Cornel West's book is about Obama joining the circus.
Ron Reagan Jr.
E11
Stephen gets a present from Afghanistan and talks to Ron Reagan about his memoir.
Chris Matthews
E12
Christine Todd Whitman discusses state budget shortfalls, and Chris Matthews defends JFK's legacy.
Charlie Rose
E13
House Republicans repeal health care to create new jobs, and Stephen talks to Charlie Rose.
Amy Chua
E14
Stephen covers home appliance safety and talks to Amy Chua about her controversial book.
Michael Waldman, Christine Yvette Lewis
E15
Michael Waldman rates the State of the Union, and Christine Yvette Lewis fights for domestic workers.
Dr. Daryl Bem, Brian Greene
E16
Stephen wonders if ESP exists and asks Brian Greene if there is a universe where people buy books.
Samer Shehata, Dr. Paul Offit
E17
There's a breakthrough in taser technology, and Dr. Paul Offit discusses the importance of vaccines.
Leslie Dach, Michael Lewis
E18
Leslie Dach confirms Wal-Mart's collaboration with Obama, and Michael Lewis discusses Wall Street.
Sean Kelly
E19
America must break its dependency on foreign turmoil, and Sean Dorrance Kelly discusses the sacred.
Jane McGonigal
E20
Stephen previews the Super Bowl and talks to Jane McGonigal about video games.
LCD Soundsystem
E21
Hosni Mubarak steps down onto a pillowy mound of money, and LCD Soundsystem performs.
Christiane Amanpour, David Albright
E22
President Twitter Bird will lead Egypt, and David Albright talks about Iran's computer virus.
Eric Foner
E23
Rupert Murdoch takes a new approach to journalism, and Eric Foner talks about Abraham Lincoln.
Jeffrey Leonard
E24
Stephen poses for Project, and Jeffrey Leonard calls out big companies' late payment policies.
Eugene Jarecki
E25
Rick Santorum complains about his Google problem, and Eugene Jarecki dispels the myths of Reagan.
Randi Weingarten, Bing West
E26
Wisconsin Democrats waddle out of the state, and Bing West discusses the way out of Afghanistan.
Stephanie Coontz
E27
Stephen brings a criminal to justice, and Stephanie Coontz talks about women in the 60s.
Glenn Greenwald, Mike Huckabee
E28
Aaron Barr threatens WikiLeaks, and Mike Huckabee doesn't believe Obama is a Muslim.
Michael Scheuer
E29
Stephen's portrait goes up for auction, and Michael Scheuer talks about Osama bin Laden.
Evan Osnos
E30
Stephen addresses America's elderly and talks to Evan Osnos about the Oscars.
Harry Connick Jr.
E31
There's a new hope for American manufacturing, and Harry Connick, Jr. won't be tickling the ivories.
Mark W. Moffett
E32
Stephen fights Jimmy Fallon over his new ice cream flavor, and Mark Moffett talks about bees.
Joshua Foer
E33
Stephen examines new questions about Obama's past and asks Joshua Foer where he put his car keys.
Dan Sinker
E34
Congress bans the sale of traditional light bulbs, and Dan Sinker impersonates Rahm Emanuel.
David Brooks
E35
Clarence Thomas may have a conflict of interest, and David Brooks talks about "The Social Animal."
Reza Aslan
E36
Al Qaeda recruits Americans, and Reza Aslan talks about the Islamic-American experience.
Steve Martin and the Steep Canyon Rangers
E37
Stephen's self-portrait goes up for auction, and Steve Martin does some bluegrass.
Ayman Mohyeldin
E38
The art world buzzes about Stephen's portrait, and Ayman Mohyeldin talks in the Situation Mosque.
Nathan Myhrvold
E39
Simon de Pury dances to Snoop Dogg, and Nathan Myhrvold uses modern scientific methods to cook food.
Jody Williams
E40
Food prices skyrocket, a cable news feud escalates, and Jody Williams wants to advance equality.
Michael Moore
E41
Labor unions fight on, and Stephen stands outside with a bullhorn to interview Michael Moore.
Dr. Anthony Fauci
E42
Stephen questions Obama's plan for Libya and talks infectious diseases with Dr. Anthony Fauci.
Tim Shriver
E43
Stephen practices Rebecca Black's "Friday" and does a PSA for Tim Shriver.
Piers Gibbon
E44
The Wisconsin anti-union law faces trouble, and Piers Gibbon talks about cannibalism.
Andrew Chaikin
E45
Stephen prepares for a world without Glenn Beck, and Andrew Chaikin wants humans to travel to Mars.
James Franco
E46
Tim Pawlenty raps about pop culture, and James Franco proves he's a Tolkien fan.
Sir David Tang
E47
Stephen prepares for the royal wedding, and David Tang corrects celebrity rumors.
Jeff Greenfield
E48
Stephen gets ready for the royal wedding and talks to Jeff Greenfield about alternate histories.
Jamie Hyneman and Adam Savage
E49
Walgreens offers Pap smears, and Jamie Hyneman and Adam Savage test the blue ice myth.
Ray Kurzweil
E50
Mitt Romney throws his hat in the ring, and Ray Kurzweil says man and machine are becoming one.
Morgan Spurlock
E51
Unilever creates armpit insecurity among women, and Morgan Spurlock addresses product placement.
Caroline Kennedy
E52
Trevor Potter helps Stephen fill out super PAC forms, and Caroline Kennedy recites poetry.
Ron Paul
E53
n this episode, Stephen recovers from a Catholic bender, and Donald Trump leads in the potential Republican candidate polls. Masturbation cures restless leg syndrome, and Ron Paul criticizes the Federal Reserve.
A.C. Grayling
E54
The climate change debate continues, and A.C. Grayling writes a secular Bible.
Ice-T
E55
The new danger in air travel comes with a $25 fee, and Ice-T talks about his memoir.
Wade Graham
E56
Stephen travels to England for the royal wedding, and asks Wade Graham about Covent Garden.
Francis Fukuyama
E57
Stephen throws a "We Got Bin Laden" party, and Francis Fukuyama warns of the Chinese threat.
Rex Ryan
E58
Stephen covers new details in the hunt for Bin Laden and talks to Rex Ryan for six minutes.
Amy Farrell
E59
"Atlas Shrugged" comes to the big screen, and Amy Farrell wants to end the persecution of fat people.
Bill James
E60
Donald Trump applies his wisdom to same-sex marriage, and Bill James discusses true crime.
Lupe Fiasco
E61
Stephen looks at a unique solution to the debt crisis in Michigan, and Lupe Fiasco performs.
Geoffrey Rush
E62
A billboard predicts the end of the world, and Geoffrey Rush explains why he's not a method actor.
Eric Greitens
E63
Stephen receives an unexpected honor, and Eric Greitens talks about being a Navy Seal.
John Bradshaw
E64
Stephen warns of a new government intrusion and talks to John Bradshaw about dog behavior.
Alison Klayman
E65
Stephen files his super PAC request, and Alison Klayman talks about Chinese artist Ai Weiwei.
Amy Kremer
E66
Stephen covers tax breaks for oil companies and talks to Amy Kremer dressed as an American patriot.
Austan Goolsbee
E67
Newt Gingrich struggles to stay on message, and Austan Goolsbee talks about the debt ceiling.
Kareem Abdul-Jabbar
E68
John Lithgow performs Gingrich's press release, and Kareem Abdul-Jabbar discusses the Harlem Rens.
James Stewart
E69
Stephen wonders if the world ended and lies about reading James Stewart's book.
Robert Kennedy, Jr.
E70
Stephen examines the Weiner scandal, and Robert F. Kennedy, Jr. makes a mountain out of a molehill.
Salman Khan
E71
Congress rejects raising the debt ceiling, and Salman Khan teaches over 53 million students.
Werner Herzog
E72
Sarah Palin describes Paul Revere's midnight ride, and Werner Herzog talks about cave paintings.
Sugar Ray Leonard
E73
Rand Paul identifies terrorists, and Stephen thumb wrestles Sugar Ray Leonard.
Bre Pettis
E74
Anthony Weiner captures the manscaping vote, and Bre Pettis print a 3-D copy of Stephen's head.
Tom Ridge
E75
Andrew Breitbart shows a photo of Anthony Weiner's penis, and Tom Ridge talks about natural gas.
Henry Kissinger
E76
Freestyle canoe dancing heats up, and Henry Kissinger discusses America's relationship with China.
Janny Scott
E77
Stephen explores "Sesame Street" corruption and talks to Janny Scott about Barack Obama's mother.
Keith Olbermann
E78
Seniors face a shocking new threat, and Keith Olbermann returns to television.
Bon Iver
E79
Stephen looks at new developments in technology, and Bon Iver performs.
Florence And The Machine
E80
Jack White helps Stephen revive his music career, and Florence and the Machine perform.
Talib Kweli
E81
Stephen comes clean with Jack White, Obama defends actions in Libya, and Talib Kweli performs.
The Black Belles
E82
Jack White presents "Charlene II (I'm Over You)," and Stephen performs with the Black Belles.
Grover Norquist
E83
Ted Nugent writes an Op-ed, and Stephen wants to claim Grover Norquist as a dependent.
Alexandra Pelosi
E84
The Supreme Court throws out a class action lawsuit against Wal-Mart, and Alexandra Pelosi discusses her documentary on immigrant naturalization in the U.S.
Gary Sinise
E85
The FEC makes a decision about Stephen's Super PAC, and Gary Sinise entertains American troops.
Timothy Garton Ash
E86
The FEC allows Stephen to form his Super PAC, and Timothy Garton Ash discusses subversive facts.
Michael Shermer
E87
The natural gas industry tries to counter bad press, and Michael Shermer discusses "Skeptic Magazine."
Dan Savage
E88
Michele Bachmann signs a controversial pledge, and Dan Savage talks about marriage and monogamy.
David McCullough
E89
The Republican Party has a fresh young face that's only 235 years old, and David McCullough has a new book about Americans in Paris.
Jose Antonio Vargas
E90
The Rupert Murdoch scandal deepens, and Jose Antonio Vargas comes out of the border-gay closet.
John Prendergast
E91
Fox News blows the lid back onto the Murdoch story, and John Prendergast discusses South Sudan.
David Carr
E92
Newt Gingrich drowns in debt, and David Carr feels like the tallest leprechaun in "Page One."
Michael Sandel
E93
A pie attack makes Rupert Murdoch sympathetic, Republicans limit who can vote, and Michael Sandel examines the ethical issue of sailor cannibalism.
David Eagleman
E94
California passes a law requiring public schools to teach gay history, NBC loves breasts, and neuroscientist David Eagleman discusses the secret lives of the brain.
Brian Cox
E95
The media assumes Norway's native gunman is Muslim, Summer's Eve uses vaginal puppetry to market their product to vaginas, and Brian Cox reveals the mysteries of space.
Brooke Gladstone
E96
Herman Cain breaks Stephen's heart, Peter Edelman talks "poors," and Brooke Gladstone reflects on the media's influence.
Mary (Missy) Cummings
E97
Home-owning vampire Patrick Rodgers turns the tables on Wells Fargo, electric car drivers face a critical deadline, and Missy Cummings develops a new breed of flying robots.
Buddy Roemer
E98
John McCain enrages Tea Partiers by calling them "Hobbits," and Republican presidential candidate Buddy Roemer won't take special-interest donations.
Tony Hsieh
E99
Stephen tells the "Billy Goats Gruff" debt ceiling story, an Alabama company turns ashes into bullets, and Zappos' C.E.O. Tony Hsieh talks about delivering happiness.
Al Hunt
E100
Scandal rocks Newt Gingrich's Twitterverse, David Leonhardt knows how to save America's credit rating, and Al Hunt thinks everyone lost the debt ceiling deal.
Robert Wittman
E101
A half-Hispanic teenager steals Spider-Man's job, Monopoly gets a makeover, and Robert Wittman solves art crimes.
Anthony Bourdain
E102
Wisconsin Democrats get bad absentee ballot applications, Stephen takes over MLB's Twitter feed, and Anthony Bourdain describes the grossest things he's ever eaten.
Nassir Ghaemi
E103
America's credit rating plummets, Prescott Group has a cheap doomsday solution, and Nassir Ghaemi thinks madness creates first-rate leaders.
The Cars
E104
The liberal media's hot-airheads have started indoctrinating America's kids.
Elliot Ackerman
E105
Father Jim Martin discusses God's job performance, political junkies donate money for a fix, and Elliot Ackerman lets voters directly nominate a president.
Gloria Steinem
E106
Mitt Romney thinks corporations are people too, Stephen reveals his super PAC ad, and Gloria Steinem discusses gender equality.
Ambassador Susan Rice
E107
Stephen apologizes to WOI in Des Moines, Michele Bachmann wins the Iowa straw poll, and Ambassador Susan Rice discusses the role of the United Nations.
STS-135 astronauts
E108
Barack Obama spins "Obamacare," Frank Luntz transforms the Colbert Super PAC, and Atlantis' crewmembers talk about their final space mission.
Jeff Bridges
E109
Rick Perry hires Colbert Super PAC's treasurer, Rick Santorum puts gay marriage into everyday napkin terms, and Jeff Bridges looks good by having fun.
Kevin Mitnick
E110
America wants a badass president, WOI reports on the "Rick Parry" write-in scandal, and hacker Kevin Mitnick is the ghost in the wires.
Gov. Tim Pawlenty
E111
People enjoy a story more when they know how it ends, Prescott Group unveils its toning shoes, and Tim Pawlenty explains why he pulled out of the presidential race.
Robin Wright
E112
The TSA makes changes to airport security, controversy surrounds Martin Luther King Jr.'s memorial, and Robin Wright discusses the cultural impact of the Arab Spring.
Tom Brokaw
E113
The GOP debate drives Stephen to watch MSNBC, Rick Perry calls Social Security a Ponzi scheme, and Tom Brokaw follows the progress of 9/11 victims' family members.
Diane Sawyer
E114
Stephen reports on an old-school reporter, America profits from grief, and Diane Sawyer discusses "Jacqueline Kennedy: In Her Own Words."
Al Gore
E115
Barack Obama unveils his jobs plan, Paul Krugman discusses the Lesser Depression, and Al Gore focuses on climate reality.
Michael Moore
E116
Fox News objects to Barack Obama's jobs bill binder clip, Stephen unveils his postal solution, and Michael Moore talks about his memoir "Here Comes Trouble."
David Copperfield
E117
Swiss banking giant UBS reports a $2 billion loss, Jimmy Fallon loves Stephen, and David Copperfield discusses the mind-bending science of perception.
Jeffrey Kluger
E118
Barack Obama unveils his deficit reduction plan; the repeal of "don't ask, don't tell" changes everything; and Jeffrey Kluger examines the bond between siblings.
Daniel Yergin
E119
Reuters' Chrystia Freeland discusses Europe's financial crisis, protestors occupy Wall Street, and Daniel Yergin discusses the world's quest for energy.
Jeremy Ben-Ami
E120
A defunct satellite threatens the earth, the Marine Corps limits troops to silent farts in Afghanistan, and Jeremy Ben-Ami discusses the Israeli-Palestinian peace process.
Radiohead
E121
America reaches a milestone in corporate civil rights, Thom Yorke and Ed O'Brien discuss global warming, and rock legend Radiohead performs.
Melinda Gates
E122
Rick Perry owns his horrific debate performance, the NFL tightens stadium security, and Melinda Gates works on improving America's public schools.
Ken Burns
E123
Rick Perry talks immigration, America gets tough on pregnant Mexicans, John Lithgow calls the Atone Phone, and Ken Burns discusses his Prohibition documentary.
Mark Cuban
E124
Karl Rove's fundraising takes a turn, Trevor Potter arms Stephen with a 501(c)(4), Kevin Kline hosts The Donating Game, and Mark Cuban talks billionaires.