Guests Thomas Lennon, Robert Ben Garant and Kerri Kenney-Silver are the co-creators and stars of Reno 911. The Comedy Central series, which spoofs COPS-style reality shows, is entering the second half of its fifth season. The trio also collaborated on the series "Viva Variety," and first worked together as members of the MTV sketch series The State.

Nellie McKay is a singer-songwriter who's garnered broad acclaim for her spectacular singing voice and her wry, funny songs.

Mike Birbiglia is a standup comedian. His new special "What I Should Have Said Was Nothing: My Secret Public Journal Live" adapts stories from his popular online diary.

Mark Evanier is that author of Kirby: King of Comics, a lavishly illustrated biography of comic book legend Jack Kirby. He also worked with Kirby in the 1960s and 70s.

David Hajdu is an award-winning cultural historian. His book The Ten Cent Plague: The Great Comic Book Scare and How It Changed America, about the censorship of comics in the mid-1950s.

Bill James is the father of sabermetrics, that objective analysis and study of baseball. His bright, funny writing brought baseball analysis to the masses in the 1980s, and helped revolutionize the management of baseball teams in the 21st century. Today, he works for the Boston Red Sox.

Sloane Crosley is author of the humorous essay collection "I Was Told There'd Be Cake." It recently debuted on the New York Times bestseller list.

Gaberiel Alvarez and Brent Rollins are members of the hip-hop media collective Ego Trip. The group produced the acclaimed magazine Ego Trip in the 1990s, and has since written two books and created several series and specials for VH1, the most recent of which is Ego Trip's Miss Rap Supreme.

John Moe is the author of Conservatize Me: How I Tried to Become a Righty With The Help of Richard Nixon, Sean Hannity, Toby Keith and Beef Jerky. He's also a contributor to American Public Media's Weekend America.

David Mitchell is half of the British comedy team Mitchell & Webb. They're the stars of the acclaimed UK TV series "Peep Show" and "That Mitchell & Webb Look," the latter of which is running in the US on BBC America.