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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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.

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

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

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

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

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.

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.

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

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.

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

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.

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.

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

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.

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

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

Father Jim Martin discusses God's job performance, political junkies donate money for a fix, and Elliot Ackerman lets voters directly nominate a president.

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

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.

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

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.

America wants a badass president, WOI reports on the "Rick Parry" write-in scandal, and hacker Kevin Mitnick is the ghost in the wires.

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.

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.

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.

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

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

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."

Swiss banking giant UBS reports a $2 billion loss, Jimmy Fallon loves Stephen, and David Copperfield discusses the mind-bending science of perception.

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.

Reuters' Chrystia Freeland discusses Europe's financial crisis, protestors occupy Wall Street, and Daniel Yergin discusses the world's quest for energy.

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.

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

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

Rick Perry talks immigration, America gets tough on pregnant Mexicans, John Lithgow calls the Atone Phone, and Ken Burns discusses his Prohibition documentary.

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.