Lindsey Vonn discusses her Austrian cheese remedy, and Bob Costas doesn't care who wins.

Tonight Stephen welcomes explorer, biologist and author of Adventures among Ants: A Global Safari with a Cast of Trillions, Mark Moffett. Also, Michael J. Fox interrupts the Word so that Stephen can sell his new book.

Scott Hamilton discusses figure skating, while Ryan St. Onge and Jeret Peterson face an intervention.

Tonight Stephen welcomes the founder of Wikileaks, Julian Assange. Also, Stephen talks with Jeffrey Toobin about the replacement of Supreme Court Justice John Paul Stevens.

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

America executes fewer prisoners, and James Fowler talks about the power of social networks.

Eugene Jarecki speaks out against large banks, and Morgan Freeman says untrustworthy things.

Stephen wins a Grammy, and Harold Ford Jr. defends his new support for gay marriage.

Shani Davis thanks the Colbert Nation for his medals, and Seth Wescott refuses to wear tight clothing.

Jeff Goldblum blesses a cigarette, and David Simon talks about his new show, "Treme."

Tonight Stephen welcomes musical group Gorillaz.

Stephen has advice for getting America back to work, and John Durant wants us to live like cavemen.

Chris Dodd wants to take away corporate free speech, and George Stephanopoulos drinks a Heineken.

Stephen profiles Chicago's 5th district, and Claire Danes discusses her role as Temple Grandin.

Stephen offends Ujjal Dosanjh and invites Shaun White for a Canadian beer.

Tonight Stephen welcomes singer Sharon Jones and the Dap Kings.

Tonight Stephen welcomes the co-author of The Dangerous Book of Heroes, Conn Iggulden.

The military responds to the underwear bomber, and Riley Crane wins a contest to find 10 balloons.

Stephen praises Bob McDonnell's speech, and David Gergen examines the State of the Union address.

Charlie Cook discusses health care reconciliation, and Sean Carroll talks about the mystery of time.

Scott Rasmussen interprets poll results, and David Aaronovitch discusses conspiracy theories.

Tonight Stephen welcomes astrophysicist and the director of the Hayden Planetarium, Neil DeGrasse Tyson

Tonight Stephen welcomes the contributing editor for the Atlantic Monthly and author of Sonic Boom: Globalization at Mach Speed, Gregg Easterbrook.

Tonight Stephen welcomes the founder of StoryCorps and author of Mom: A Celebration of Mothers from StoryCorps, David Isay.

Manned spaceflight nears its end, and Ayaan Hirsi Ali lives under a constant death threat.