9x67 - Dr. Michio Kaku

February 26, 2013

Pope Benedict shares the Vatican with his successor, Jeremy Bird disrupts the natural order in Texas, Al Qaeda evades drone attacks, and Michio Kaku tracks asteroid paths.

9x68 - Paola Antonelli

February 27, 2013

Stephen endorses Halls cough drops, the government bugs Khalid Sheikh Mohammed's trial, John Kerry makes a case for dimwits, and Paola Antonelli shares the future of design.

9x69 - Jon Favreau

February 28, 2013

Pat Robertson confirms that demons occupy garments, shops sell Pope Benedict XVI memorabilia, federal spending cuts loom, and Jon Favreau describes speechwriting methods.

9x70 - Kirk Bloodsworth

March 4, 2013

Obama confuses "Star Wars" with "Star Trek," Stephen investigates scallop gonad research, Texas reconsiders gun training, and Kirk Bloodsworth opposes the death penalty.

9x71 - James Franco

March 5, 2013

Hugo Chavez passes away, Obama travels to Israel, Michael Oren discusses Iran, married couples retreat to Mars, and James Franco talks "Oz.

9x72 - Brendan O'Connell

March 6, 2013

The media introduces "Snowquester," Alabama calls the Voting Rights Act into question, Michael Bloomberg bans soda deliveries, and Wal-Mart inspires Brendan O'Connell.

9x73 - John Sexton

March 7, 2013

Rand Paul talks for 13 hours, North Korea creates an ominous music video, "The Bachelor" incites emotionally-charged staring, and John Sexton compares baseball and religion.

9x74 - Junot Diaz

March 25, 2013

The Vatican welcomes Pope Francis, Roma Downey stars in "The Bible," Trevor Potter memorializes Ham Rove, and Junot Diaz shares the Freedom University project.

9x75 - Eric Topol

March 26, 2013

Republicans contemplate a Celebrity Task Force, Senator Rob Portman flip-flops on gay marriage, and Eric Topol shares his book, "The Creative Destruction of Medicine.

9x76 - Carl Edgar Blake II

March 27, 2013

Papa Bear reassess gay marriage, scientists study Facebook "Likes," Tennessee lawmakers mistrust a mop sink, and Carl Edgar Blake II shows off his pigs.

9x77 - Robert Lustig

March 28, 2013

Same-sex marriage divides the Supreme Court, Emily Bazelon explains Proposition 8 and the Defense of Marriage Act, and Robert Lustig warns against sugar.

9x78 - Sigourney Weaver

April 1, 2013

Google pays tribute to Cesar Chavez, Pope Francis breaks a New Testament tradition, Tennessee uses a health care lottery, and Sigourney Weaver talks theater.

9x79 - Jim McGreevey

April 2, 2013

Sue Everhart warns of gay marriage fraud, Victor Cha dissects North Korea's bomb threats, Florida plans to outlaw bongs, and Jim McGreevey advocates in-prison rehab.

9x80 - A.C. Grayling

April 3, 2013

Mark Sanford runs against Elizabeth Colbert Busch, Louie Gohmert compares gun control to bestiality, the GOP surveys young people, and A.C. Grayling talks God and reason.

9x81 - Francis Collins

April 4, 2013

An Exxon pipeline bursts in Arkansas, Jeremy Irons compares gay marriage to incest, and NIH Director Francis Collins explains Obama's BRAIN Initiative.

9x82 - Bill Clinton

April 8, 2013

At the Clinton Global Initiative University Meeting, President Bill Clinton discusses foreign aid, poverty, TED Talks, Twitter and the Colbert Galactic Initiative.

9x83 - Charlie LeDuff

April 9, 2013

Stephen attends the Clinton Global Initiative University Exchange, Exxon sweeps oil into storm drains, and Charlie LeDuff shares his book, "Detroit: An American Autopsy.

9x84 - Shane Smith

April 10, 2013

The Navy builds a laser missile, Senate Republicans give in to gun control, Anthony Weiner ponders the mayoral race, and VICE cofounder Shane Smith talks storytelling.

9x85 - Cass Sunstein

April 11, 2013

NASA develops an asteroid lasso, Nick Gillespie talks about pot legalization, New York City targets filthy Times Square mascots, and Cass Sunstein slams the food pyramid.

9x86 - Caroline Kennedy

April 16, 2013

Terrorists attack the Boston Marathon, Canada manufactures Sexcereal, the Rollie Eggmaster cooks up gelatinous egg rods, and Caroline Kennedy recites poetry with Stephen.

9x87 - Alan Cumming

April 17, 2013

The media dreams up Boston bombing suspects, Adam Davidson explains Bitcoin, Brad Paisley makes a sucky song about racism, and Alan Cumming tackles an almost one-man play.

9x88 - Richard Engel

April 18, 2013

The New York Post misidentifies Boston Marathon suspects, Stephen debuts the Bucket, the Senate opposes gun background checks, and Richard Engel describes Syrian militias.

9x89 - Michael Pollan

April 22, 2013

The Boston manhunt ends, Canadian police expose an Al Qaeda plot, America's infrastructure earns a bad grade, and Michael Pollan describes the four ways of cooking.

9x90 - Eric Schmidt

April 23, 2013

Chris Christie is full of Scooby-Doo-doo, Thomas Herndon takes down Reinhart and Rogoff, and Google's Eric Schmidt talks digital identities.

9x91 - Danica Patrick

April 24, 2013

Twitter hackers trigger a market crash, Bill Clinton picks a dignified Twitter name, the Mars rover draws a penis in the sand, and NASCAR's Danica Patrick manages her rage.

9x92 - Gene Robinson

April 25, 2013

Stephen starts an "O" Book Club, Matt Cartwright speaks Spanish, Fox & Friends gets the word out about a guy singing like a canary, and Gene Robinson advocates gay rights.

9x93 - Iggy & the Stooges

April 29, 2013

Jason Collins comes out as gay, New Zealand sanctions same-sex marriage, conservatives get defensive, criminals turn to Yelp, and Iggy Pop performs shirtless.

9x94 - Evan Spiegel & Bobby Murphy

April 30, 2013

Congress disregards the Army's wishes, Iowa cracks illegal immigration, Budweiser encourages Facebook friendships, and Evan Spiegel and Bobby Murphy make photos disappear.

9x95 - Macklemore & Ryan Lewis

May 1, 2013

A Newtown victim's daughter confronts Senator Kelly Ayotte, pro-gun senators lose voters' support, and Macklemore and Ryan Lewis share their album, "The Heist.

9x96 - Ben Kingsley

May 2, 2013

The Feds identify three accomplices in the Boston bombings, President Obama addresses the Gitmo hunger strike, and Sir Ben Kingsley chats about "Iron Man 3.

9x97 - Robert Caro

May 6, 2013

Stephen plugs cOlbert's Book Club, conspiracy theorists explain the government's ammo purchases, dogs ride the Mary Jane train, and Robert Caro scares Republicans.

9x98 - Douglas Rushkoff

May 7, 2013

Fox News prepares for the Benghazi whistleblowers, Rep. Donna Edwards deals with a senile senior, teens amp up their promposals, and Douglas Rushkoff pinpoints the present.

9x99 - Richard Besser

May 8, 2013

Stephen's sister loses her run for Congress, Republicans spite Obama, parents forego diapers, and Richard Besser shares his book, "Tell Me the Truth, Doctor.

9x100 - Baz Luhrmann

May 9, 2013

Carey Mulligan divulges a dark secret, Jennifer Egan discusses "The Great Gatsby"'s place in American letters, and Baz Luhrmann pays homage to F. Scott Fitzgerald.

9x101 - Jessica Buchanan & Erik Landemalm

May 13, 2013

The Obama administration lies about Benghazi talking points, the IRS inspects Tea Party groups, and Jessica Buchanan and Erik Landemalm share their book, "Impossible Odds.

9x102 - Dan Brown

May 14, 2013

The House tries to repeal Obamacare again, an immigration study slams Hispanics, Maxim honors Miley Cyrus, and Dan Brown takes inspiration from Dante.

9x103 - Cyndi Lauper

May 15, 2013

The UN describes bugs as "mini-livestock," Congresswoman Gwen Moore rides shotgun, and Cyndi Lauper outlines her Broadway musical, "Kinky Boots.

9x104 - Daniel Lieberman

May 16, 2013

Congress peppers and grills Eric Holder, China seeks peace in the Middle East, a nonprofit provides access to printable guns, and Daniel Lieberman endorses toe shoes.

9x105 - David Sassoon

May 20, 2013

ABC's Jonathan Karl lies about the Benghazi scandal, Stephen applies for Tea Party tax exemption, and David Sassoon shares his e-book, "The Dilbit Disaster.

9x106 - Noah Feldman

May 21, 2013

Scientists solve the Irish potato famine mystery, pot boosts metabolism, Rep. Jeff Duncan plans to ban the census, and Noah Feldman describes the Cool War with China.

9x107 - The National

May 22, 2013

Lois Lerner won't spill the IRS scandal beans, Mitch McConnell endorses hemp, PBS appeases David Koch, and The National shares their album "Trouble Will Find Me.

9x108 - Christopher Chivers

May 23, 2013

Barack Obama addresses his usage of drones, Andrew Bacevich thinks war is bad, Pope Francis embraces atheists, and C.J. Chivers reports on Syrian rebels.

9x109 - John Dingell

June 3, 2013

Mark Pocan tempts Stephen with divorce, precision-guided guns promote skill-free killing, and John Dingell wants Congress to learn how to compromise.

9x110 - Alex Gibney

June 4, 2013

The Report pays tribute to Michele Bachmann, NASA researches printable food, the IRS invests in line dancing, and Alex Gibney explores WikiLeaks.

9x111 - Jonathan Alter

June 5, 2013

Superman gets a makeover, Laurie Garrett reviews Monsanto's wheat incident, the Chicago Sun-Times scraps photojournalism, and Jonathan Alter dissects the 2012 election.

9x112 - Stephen King, John Mellencamp, & T Bone Burnett

June 6, 2013

The Obama administration snoops on Verizon customers, Stephen becomes a spy, and Stephen King writes a musical with John Mellencamp and T Bone Burnett.

9x113 - Dan Savage

June 10, 2013

The NSA whistleblower explains himself, violent protests break out in Turkey, missile launch officers dislike their jobs, and Dan Savage criticizes DOMA.

9x114 - Daniel Bergner

June 11, 2013

NSA Wiretapping Scandal, Jeffrey Rosen on the Fourth Amendment, TSA Detains Chewbacca, Daniel Bergner, "What Do Women Want?".

9x115 - Paul McCartney

June 12, 2013

The NSA builds a data compound, Paul McCartney describes his music career with The Beatles and Wings, and Michael Bloomberg's bike share "begrimes" New York.

9x116 - The Postal Service

June 19, 2013

Stephen honors his late mother, Cap'n Crunch lies about his rank, house flipping makes a comeback, and the Postal Service discusses their electronic music.

9x118 - Andrew Solomon

June 24, 2013

NSA leaker Edward Snowden goes missing, Darrell Issa probes the IRS, news becomes truthinews, the KKK engineers a laser, and Andrew Solomon defines "exceptional" children.

9x119 - Peniel Joseph

June 25, 2013

The Supreme Court guts part of the Voting Rights Act, Brazilians protest government spending, and Peniel Joseph criticizes the Supreme Court's decision.

9x120 - Bill Moyers

June 26, 2013

Gay marriage gets a legal boost, Emily Bazelon analyzes the Supreme Court's decisions, and Bill Moyers chronicles the slow death of the American middle class.

9x121 - Chuck Schumer

June 27, 2013

Mayor Michael Bloomberg declares war on the 4th of July, the Senate enacts immigration reform, and Senator Chuck Schumer talks tattoos and gang signs.

9x122 - Jeremy Scahill

July 15, 2013

A Florida jury acquits George Zimmerman, Stephen inspects a SkyMiles scandal, Asiana Airlines sues KTVU over made-up pilot names, and Jeremy Scahill criticizes drone strikes.

9x123 - David Karp

July 16, 2013

Britain prepares for the royal baby, George Zimmerman protestors sing instead of riot, NPR critiques multitaskers, and David Karp promises not to police Tumblr.

9x124 - Jerry Seinfeld

July 17, 2013

Rolling Stone features the Boston bombing suspect, Congress removes food stamps from the farm bill, and Jerry Seinfeld shares his series, "Comedians in Cars Getting Coffee.

9x125 - Jeff Bridges

July 18, 2013

Edward Snowden seeks asylum in Russia, San Diego's mayor faces sexual harassment charges, Eliot Spitzer runs for NYC comptroller, and Jeff Bridges shares his film, "R.I.P.D.

9x126 - Kjerstin Gruys

July 22, 2013

Kate Middleton delivers her baby, Geraldo Rivera tweets a naked selfie, fast food workers protest the minimum wage, and Kjerstin Gruys examines body image issues.

9x127 - Kenneth Goldsmith

July 23, 2013

The Prince of Wails is born, George Zimmerman helps a family in need, Barack Obama empathizes with black men, and poet Kenneth Goldsmith revisits seven U.S. tragedies.

9x128 - Anant Agarwal

July 24, 2013

The royal couple name their baby George, Anthony Weiner apologizes for his latest sexts, Kanye West designs a blank t-shirt, and Anant Agarwal discusses his nonprofit, edX.

9x129 - Olympia Snowe

July 25, 2013

An MC crashes the royal birth, Detroit files for bankruptcy, Steve King incites Jorge Ramos, and Olympia Snowe shares her book, "Fighting for Common Ground".

9x130 - The Lumineers

July 29, 2013

FreedomWorks burns fake Obama insurance cards, North Carolina allows concealed weapons in bars, and the Lumineers share their self-titled debut album.

9x131 - Atul Gawande

July 30, 2013

Surgeon and writer Atul Gawande discusses his New Yorker article "Slow Ideas."

9x132 - Emily Matchar

July 31, 2013

Bradley Manning is found not guilty, Barack Obama and Hillary Clinton have lunch, Chris Christie and Rand Paul feud, and Emily Matchar shares the "new domesticity".

9x133 - Bryan Cranston

August 1, 2013

Russia protects Edward Snowden, Mayor Bob Filner blames San Diego for his sexual misconduct, Gitmo prisoners read erotic romance, and Bryan Cranston talks meth and Malcolm.

9x134 - Hugh Laurie

August 5, 2013

The U.S. government warns of a looming terror threat somewhere, Alex Rodriguez gets suspended for doping, and Hugh Laurie shares his blues album, "Didn't It Rain".

9x135 - Robin Thicke

August 6, 2013

Daft Punk abandons StePhest Colbchella '013, Stephen angers his Hyundai sponsors, and "Blurred Lines" singer Robin Thicke saves Stephen's career.

9x136 - Ashton Kutcher

August 7, 2013

Online critics bash StePhest Colbchella '013, union activist Mary Kay Henry supports fast-food strikers, the SEC comes down on a trader, and Ashton Kutcher talks "Jobs.

9x137 - Colum McCann

August 8, 2013

CNN's doctor switches his position on pot, Matt Damon comes to Stephen's rescue, Darrell Issa wants ocean waters named after Reagan, and Colum McCann talks "TransAtlantic.

9x138 - Sheldon Whitehouse

August 12, 2013

The Today Show features twerking, Senator Rush Holt champions public education, and Senator Sheldon Whitehouse chats about his book, "On Virtues.

9x139 - John Lewis

August 13, 2013

Mayor Mike Bloomberg defends New York's stop-and-frisk, the TSA expands its duties, and Congressman John Lewis chats about his graphic novel, "March".

9x140 - Kevin Spacey

August 14, 2013

Russia's anti-gay laws affect Olympic athletes, Obama hires psychologists to "nudge" public opinion, and Kevin Spacey talks "House of Cards".

9x141 - Richard Brodhead

August 15, 2013

A rodeo clown wears an Obama mask, fracking companies put gag orders on families, Obama talks NSA transparency, and Professor Richard Brodhead promotes the humanities.

9x142 - Timothy Cardinal Dolan

September 3, 2013

Syrian dictator Bashar al-Assad employs chemical weapons, The Daily Show gets Jon back, Rep. Dan Kildee promotes sugar beets, and Timothy Cardinal Dolan examines the papacy.

9x143 - Gary England

September 4, 2013

Barack Obama endorses military action in Syria, The New Yorker's Steve Coll unpacks the president's decision, and meteorologist Gary England talks twisters.

9x144 - John Prine

September 5, 2013

Ariel Castro commits suicide, kittens close down the NYC subway, Stephen assigns reading for cOlbert's Book Club, and John Prine shares his folk album, "The Missing Years.

9x145 - Billie Jean King

September 9, 2013

Americans oppose military action in Syria, Fox News dreams up "Super Reagan," Iowa grants gun permits to blind people, and Billie Jean King recalls the "Battle of the Sexes.

9x146 - Shane Salerno

September 10, 2013

9x147 - Sheryl Crow

September 11, 2013

New York City holds the mayoral primary, Syria agrees to surrender its chemical weapons, Rand Paul flip-flops, and Sheryl Crow discusses her album, "Feels Like Home.

9x148 - Philip Mudd

September 12, 2013

The New York Times prints Vladimir Putin's op-ed on Syria, Rep. Jim McDermott defends gay rights, and Philip Mudd shares his book, "Takedown: Inside the Hunt for Al Qaeda.

9x149 - Andrew Bacevich

September 16, 2013

Stephen honors the Lehman Brothers, pundits criticize government "moochers," Miss America receives racist comments, and Andrew Bacevich shares his book, "Breach of Trust.

9x150 - Arne Duncan

September 17, 2013

Billionaires get left behind, Kanye West performs for Kazakhstan's controversial leader, Cheerios cashes in on death, and Arne Duncan endorses early education.

9x151 - Nicholson Baker

September 18, 2013

Andrew Sullivan supports U.N. intervention in Syria, conservatives attack gun violence in video games, and Nicholson Baker shares his book, "Traveling Sprinkler.

9x152 - Jack Johnson

September 19, 2013

Michelle Obama promotes H2O, Republicans regulate Obamacare navigators, Jihawg Ammo makes bacon bullets, and Jack Johnson shares his album, "From Here to Now to You.

9x153 - Metallica

September 24, 2013

Jon Stewart congratulates Stephen on his Emmys, Pope Francis speaks out on Catholic teachings, and Metallica presents its film, "Metallica: Through the Never.

9x154 - Joseph Gordon-Levitt

September 25, 2013

9x155 - Chris Fischer

September 26, 2013

Season finale.