Seasons & episodes

TONIGHT: Host of "Peter Jennings Reporting: UFOs - Seeing Is Believing", Peter Jennings!

TONIGHT: Star of "Cursed", Christina Ricci! Plus, Lewis' "Back In Black"!

TONIGHT: Senator Ben Nelson! Nebraska Senator Ben Nelson talks to Jon about the joys of being nicknamed by George W.

TONIGHT: Author of "The Superpower Myth: The Use and Misuse of American Might", Nancy Soderberg!

TONIGHT: Star of "Be Cool", The Rock! The Rock discusses transitioning from the art of beating people up to film.

TONIGHT: Former White House press secretary Ari Fleischer discusses whether the press corps is obsolete.

TONIGHT: Author of "Denial and Deception: An Insider's View of the CIA from Iran-Contra to 9/11", Melissa Boyle Mahle!

TONIGHT: Jon helps NBC News Anchor Brian Williams tell the difference between the Daily Show and his news.

TONIGHT: Actor Bruce Willis talks about his new movie, "Hostage".

TONIGHT: Economist Paul Krugman talks about his new book and the potential collapse of the New Deal.

TONIGHT: Princeton philosophy professor Harry Frankfurt talks about his book "On Bullshit".

TONIGHT: Author Tom Fenton explains why the news business is at an all-time low.

TONIGHT: Guest star is the Reverend Al Green. The Reverend Al sings to Jon and analyzes the power of his own voice.

TONIGHT: Craid Ferguson, the host of the Late Late Show, guest stars. Craig Ferguson tends to classify himself only with puppets.

TONIGHT: Actress Sandra Bullock guest stars. Sandra Bullock discusses the sexy power of shooting an automatic weapon.

TONIGHT: Star of "The Interpreter," Catherine Keener. Plus, Lewis "Back In" Black.

Steve Carell, who has been off the show for more than a year, working on other shows, made a cameo in a bit on the show.

TONIGHT: Member of "Wu-Tang", The RZA!

Steve Carell made a cameo in a bit on the show, as Produce Pete. This is Steve's second appearance in the past few days, after being away for more than a year.

TONIGHT: New York Times columnist Thomas Friedman talks about his new book, "The World is Flat."

TONIGHT: Star of "Sahara", Matthew McConaughey.

TONIGHT: Actress Drew Barrymore guest stars. Drew Barrymore talks about bum rushing the Red Sox.

TONIGHT: Author of "The Vast Left Wing Conspiracy", Byron York! Plus, Colbert reports on "Tattoo Discrimination."

TONIGHT: Author of "One Soldier's Story: A Memoir," Senator Bob Dole! Plus, Lewis "Back In" Black.