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Gov. Ed Rendell

Episode number: 1

Overview: Stephen uncovers a menace in Florida and talks to Ed Rendell about leaving office by choice.

Geoffrey Canada

Episode number: 2

Overview: Some want the dollar to be converted back to gold, and Geoffrey Canada advocates for education reform.

Atul Gawande

Episode number: 3

Overview: America's fruit supply is in danger, and Atul Gawande wants to reduce health risks in hospitals.

Dr. Ronald DePinho

Episode number: 4

Overview: Neil deGrasse Tyson explains how tides work, and Robert DePinho wants to reverse the aging process.

Fen Montaigne

Episode number: 5

Overview: Stephen violates the Constitution, and Fen Montaigne talks about Antarctic penguins.

Chris Hughes

Episode number: 6

Overview: Stephen picks this year's Grammy winners, and Chris Hughes starts a site for Jewish sumo wrestlers.

Bernard-Henri Levy

Episode number: 7

Overview: 50 Cent makes $8 million on Twitter, and Bernard-Henri Levy discusses public intellectualism.

Kevin Spacey

Episode number: 8

Overview: Hitler delivers a moving speech in Tucson, and Stephen pictures Kevin Spacey naked with rose petals.

Sherry Turkle

Episode number: 9

Overview: Stephen unveils a new portrait of himself and talks to Sherry Turkle about alienating technology.

Cornel West

Episode number: 10

Overview: Stephen looks at education reform and assumes Cornel West's book is about Obama joining the circus.

Ron Reagan Jr.

Episode number: 11

Overview: Stephen gets a present from Afghanistan and talks to Ron Reagan about his memoir.

Chris Matthews

Episode number: 12

Overview: Christine Todd Whitman discusses state budget shortfalls, and Chris Matthews defends JFK's legacy.

Charlie Rose

Episode number: 13

Overview: House Republicans repeal health care to create new jobs, and Stephen talks to Charlie Rose.

Amy Chua

Episode number: 14

Overview: Stephen covers home appliance safety and talks to Amy Chua about her controversial book.

Michael Waldman, Christine Yvette Lewis

Episode number: 15

Overview: Michael Waldman rates the State of the Union, and Christine Yvette Lewis fights for domestic workers.

Dr. Daryl Bem, Brian Greene

Episode number: 16

Overview: Stephen wonders if ESP exists and asks Brian Greene if there is a universe where people buy books.

Samer Shehata, Dr. Paul Offit

Episode number: 17

Overview: There's a breakthrough in taser technology, and Dr. Paul Offit discusses the importance of vaccines.

Leslie Dach, Michael Lewis

Episode number: 18

Overview: Leslie Dach confirms Wal-Mart's collaboration with Obama, and Michael Lewis discusses Wall Street.

Sean Kelly

Episode number: 19

Overview: America must break its dependency on foreign turmoil, and Sean Dorrance Kelly discusses the sacred.

Jane McGonigal

Episode number: 20

Overview: Stephen previews the Super Bowl and talks to Jane McGonigal about video games.

LCD Soundsystem

Episode number: 21

Overview: Hosni Mubarak steps down onto a pillowy mound of money, and LCD Soundsystem performs.

Christiane Amanpour, David Albright

Episode number: 22

Overview: President Twitter Bird will lead Egypt, and David Albright talks about Iran's computer virus.

Eric Foner

Episode number: 23

Overview: Rupert Murdoch takes a new approach to journalism, and Eric Foner talks about Abraham Lincoln.

Jeffrey Leonard

Episode number: 24

Overview: Stephen poses for Project, and Jeffrey Leonard calls out big companies' late payment policies.

Eugene Jarecki

Episode number: 25

Overview: Rick Santorum complains about his Google problem, and Eugene Jarecki dispels the myths of Reagan.

Randi Weingarten, Bing West

Episode number: 26

Overview: Wisconsin Democrats waddle out of the state, and Bing West discusses the way out of Afghanistan.

Stephanie Coontz

Episode number: 27

Overview: Stephen brings a criminal to justice, and Stephanie Coontz talks about women in the 60s.

Glenn Greenwald, Mike Huckabee

Episode number: 28

Overview: Aaron Barr threatens WikiLeaks, and Mike Huckabee doesn't believe Obama is a Muslim.

Michael Scheuer

Episode number: 29

Overview: Stephen's portrait goes up for auction, and Michael Scheuer talks about Osama bin Laden.

Evan Osnos

Episode number: 30

Overview: Stephen addresses America's elderly and talks to Evan Osnos about the Oscars.

Harry Connick Jr.

Episode number: 31

Overview: There's a new hope for American manufacturing, and Harry Connick, Jr. won't be tickling the ivories.

Mark W. Moffett

Episode number: 32

Overview: Stephen fights Jimmy Fallon over his new ice cream flavor, and Mark Moffett talks about bees.

Joshua Foer

Episode number: 33

Overview: Stephen examines new questions about Obama's past and asks Joshua Foer where he put his car keys.

Dan Sinker

Episode number: 34

Overview: Congress bans the sale of traditional light bulbs, and Dan Sinker impersonates Rahm Emanuel.

David Brooks

Episode number: 35

Overview: Clarence Thomas may have a conflict of interest, and David Brooks talks about "The Social Animal."

Reza Aslan

Episode number: 36

Overview: Al Qaeda recruits Americans, and Reza Aslan talks about the Islamic-American experience.

Steve Martin and the Steep Canyon Rangers

Episode number: 37

Overview: Stephen's self-portrait goes up for auction, and Steve Martin does some bluegrass.

Ayman Mohyeldin

Episode number: 38

Overview: The art world buzzes about Stephen's portrait, and Ayman Mohyeldin talks in the Situation Mosque.

Nathan Myhrvold

Episode number: 39

Overview: Simon de Pury dances to Snoop Dogg, and Nathan Myhrvold uses modern scientific methods to cook food.

Jody Williams

Episode number: 40

Overview: Food prices skyrocket, a cable news feud escalates, and Jody Williams wants to advance equality.

Michael Moore

Episode number: 41

Overview: Labor unions fight on, and Stephen stands outside with a bullhorn to interview Michael Moore.

Dr. Anthony Fauci

Episode number: 42

Overview: Stephen questions Obama's plan for Libya and talks infectious diseases with Dr. Anthony Fauci.

Tim Shriver

Episode number: 43

Overview: Stephen practices Rebecca Black's "Friday" and does a PSA for Tim Shriver.

Piers Gibbon

Episode number: 44

Overview: The Wisconsin anti-union law faces trouble, and Piers Gibbon talks about cannibalism.

Andrew Chaikin

Episode number: 45

Overview: Stephen prepares for a world without Glenn Beck, and Andrew Chaikin wants humans to travel to Mars.

James Franco

Episode number: 46

Overview: Tim Pawlenty raps about pop culture, and James Franco proves he's a Tolkien fan.

Sir David Tang

Episode number: 47

Overview: Stephen prepares for the royal wedding, and David Tang corrects celebrity rumors.

Jeff Greenfield

Episode number: 48

Overview: Stephen gets ready for the royal wedding and talks to Jeff Greenfield about alternate histories.

Jamie Hyneman and Adam Savage

Episode number: 49

Overview: Walgreens offers Pap smears, and Jamie Hyneman and Adam Savage test the blue ice myth.

Ray Kurzweil

Episode number: 50

Overview: Mitt Romney throws his hat in the ring, and Ray Kurzweil says man and machine are becoming one.

Morgan Spurlock

Episode number: 51

Overview: Unilever creates armpit insecurity among women, and Morgan Spurlock addresses product placement.

Caroline Kennedy

Episode number: 52

Overview: Trevor Potter helps Stephen fill out super PAC forms, and Caroline Kennedy recites poetry.

Ron Paul

Episode number: 53

Overview: 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

Episode number: 54

Overview: The climate change debate continues, and A.C. Grayling writes a secular Bible.

Ice-T

Episode number: 55

Overview: The new danger in air travel comes with a $25 fee, and Ice-T talks about his memoir.

Wade Graham

Episode number: 56

Overview: Stephen travels to England for the royal wedding, and asks Wade Graham about Covent Garden.

Francis Fukuyama

Episode number: 57

Overview: Stephen throws a "We Got Bin Laden" party, and Francis Fukuyama warns of the Chinese threat.

Rex Ryan

Episode number: 58

Overview: Stephen covers new details in the hunt for Bin Laden and talks to Rex Ryan for six minutes.

Amy Farrell

Episode number: 59

Overview: "Atlas Shrugged" comes to the big screen, and Amy Farrell wants to end the persecution of fat people.

Bill James

Episode number: 60

Overview: Donald Trump applies his wisdom to same-sex marriage, and Bill James discusses true crime.

Lupe Fiasco

Episode number: 61

Overview: Stephen looks at a unique solution to the debt crisis in Michigan, and Lupe Fiasco performs.

Geoffrey Rush

Episode number: 62

Overview: A billboard predicts the end of the world, and Geoffrey Rush explains why he's not a method actor.

Eric Greitens

Episode number: 63

Overview: Stephen receives an unexpected honor, and Eric Greitens talks about being a Navy Seal.

John Bradshaw

Episode number: 64

Overview: Stephen warns of a new government intrusion and talks to John Bradshaw about dog behavior.

Alison Klayman

Episode number: 65

Overview: Stephen files his super PAC request, and Alison Klayman talks about Chinese artist Ai Weiwei.

Amy Kremer

Episode number: 66

Overview: Stephen covers tax breaks for oil companies and talks to Amy Kremer dressed as an American patriot.

Austan Goolsbee

Episode number: 67

Overview: Newt Gingrich struggles to stay on message, and Austan Goolsbee talks about the debt ceiling.

Kareem Abdul-Jabbar

Episode number: 68

Overview: John Lithgow performs Gingrich's press release, and Kareem Abdul-Jabbar discusses the Harlem Rens.

James Stewart

Episode number: 69

Overview: Stephen wonders if the world ended and lies about reading James Stewart's book.

Robert Kennedy, Jr.

Episode number: 70

Overview: Stephen examines the Weiner scandal, and Robert F. Kennedy, Jr. makes a mountain out of a molehill.

Salman Khan

Episode number: 71

Overview: Congress rejects raising the debt ceiling, and Salman Khan teaches over 53 million students.

Werner Herzog

Episode number: 72

Overview: Sarah Palin describes Paul Revere's midnight ride, and Werner Herzog talks about cave paintings.

Sugar Ray Leonard

Episode number: 73

Overview: Rand Paul identifies terrorists, and Stephen thumb wrestles Sugar Ray Leonard.

Bre Pettis

Episode number: 74

Overview: Anthony Weiner captures the manscaping vote, and Bre Pettis print a 3-D copy of Stephen's head.

Tom Ridge

Episode number: 75

Overview: Andrew Breitbart shows a photo of Anthony Weiner's penis, and Tom Ridge talks about natural gas.

Henry Kissinger

Episode number: 76

Overview: Freestyle canoe dancing heats up, and Henry Kissinger discusses America's relationship with China.

Janny Scott

Episode number: 77

Overview: Stephen explores "Sesame Street" corruption and talks to Janny Scott about Barack Obama's mother.

Keith Olbermann

Episode number: 78

Overview: Seniors face a shocking new threat, and Keith Olbermann returns to television.

Bon Iver

Episode number: 79

Overview: Stephen looks at new developments in technology, and Bon Iver performs.

Florence And The Machine

Episode number: 80

Overview: Jack White helps Stephen revive his music career, and Florence and the Machine perform.

Talib Kweli

Episode number: 81

Overview: Stephen comes clean with Jack White, Obama defends actions in Libya, and Talib Kweli performs.

The Black Belles

Episode number: 82

Overview: Jack White presents "Charlene II (I'm Over You)," and Stephen performs with the Black Belles.

Grover Norquist

Episode number: 83

Overview: Ted Nugent writes an Op-ed, and Stephen wants to claim Grover Norquist as a dependent.

Alexandra Pelosi

Episode number: 84

Overview: 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

Episode number: 85

Overview: The FEC makes a decision about Stephen's Super PAC, and Gary Sinise entertains American troops.

Timothy Garton Ash

Episode number: 86

Overview: The FEC allows Stephen to form his Super PAC, and Timothy Garton Ash discusses subversive facts.

Michael Shermer

Episode number: 87

Overview: The natural gas industry tries to counter bad press, and Michael Shermer discusses "Skeptic Magazine."

Dan Savage

Episode number: 88

Overview: Michele Bachmann signs a controversial pledge, and Dan Savage talks about marriage and monogamy.

David McCullough

Episode number: 89

Overview: 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

Episode number: 90

Overview: The Rupert Murdoch scandal deepens, and Jose Antonio Vargas comes out of the border-gay closet.

John Prendergast

Episode number: 91

Overview: Fox News blows the lid back onto the Murdoch story, and John Prendergast discusses South Sudan.

David Carr

Episode number: 92

Overview: Newt Gingrich drowns in debt, and David Carr feels like the tallest leprechaun in "Page One."

Michael Sandel

Episode number: 93

Overview: A pie attack makes Rupert Murdoch sympathetic, Republicans limit who can vote, and Michael Sandel examines the ethical issue of sailor cannibalism.

David Eagleman

Episode number: 94

Overview: 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

Episode number: 95

Overview: 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

Episode number: 96

Overview: Herman Cain breaks Stephen's heart, Peter Edelman talks "poors," and Brooke Gladstone reflects on the media's influence.

Mary (Missy) Cummings

Episode number: 97

Overview: 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

Episode number: 98

Overview: John McCain enrages Tea Partiers by calling them "Hobbits," and Republican presidential candidate Buddy Roemer won't take special-interest donations.

Tony Hsieh

Episode number: 99

Overview: 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

Episode number: 100

Overview: 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

Episode number: 101

Overview: A half-Hispanic teenager steals Spider-Man's job, Monopoly gets a makeover, and Robert Wittman solves art crimes.

Anthony Bourdain

Episode number: 102

Overview: 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

Episode number: 103

Overview: America's credit rating plummets, Prescott Group has a cheap doomsday solution, and Nassir Ghaemi thinks madness creates first-rate leaders.

The Cars

Episode number: 104

Overview: The liberal media's hot-airheads have started indoctrinating America's kids.

Elliot Ackerman

Episode number: 105

Overview: 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

Episode number: 106

Overview: Mitt Romney thinks corporations are people too, Stephen reveals his super PAC ad, and Gloria Steinem discusses gender equality.

Ambassador Susan Rice

Episode number: 107

Overview: 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

Episode number: 108

Overview: Barack Obama spins "Obamacare," Frank Luntz transforms the Colbert Super PAC, and Atlantis' crewmembers talk about their final space mission.

Jeff Bridges

Episode number: 109

Overview: 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

Episode number: 110

Overview: 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

Episode number: 111

Overview: 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

Episode number: 112

Overview: 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

Episode number: 113

Overview: 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

Episode number: 114

Overview: Stephen reports on an old-school reporter, America profits from grief, and Diane Sawyer discusses "Jacqueline Kennedy: In Her Own Words."

Al Gore

Episode number: 115

Overview: Barack Obama unveils his jobs plan, Paul Krugman discusses the Lesser Depression, and Al Gore focuses on climate reality.

Michael Moore

Episode number: 116

Overview: 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

Episode number: 117

Overview: 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

Episode number: 118

Overview: 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

Episode number: 119

Overview: 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

Episode number: 120

Overview: 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

Episode number: 121

Overview: America reaches a milestone in corporate civil rights, Thom Yorke and Ed O'Brien discuss global warming, and rock legend Radiohead performs.

Melinda Gates

Episode number: 122

Overview: Rick Perry owns his horrific debate performance, the NFL tightens stadium security, and Melinda Gates works on improving America's public schools.

Ken Burns

Episode number: 123

Overview: 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

Episode number: 124

Overview: 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.