4 - 1Andrew Sullivan, Richard Freeman Jan. 07, 2008- 4 - 2Chris Beam, Gary Rosen Jan. 08, 2008
- 4 - 3Gov. Mike Huckabee, Matt Taibbi Jan. 09, 2008
- 4 - 4Norman Ornstein, Muhammad Yunus Jan. 10, 2008
- 4 - 5Neil Shubin Jan. 14, 2008
- 4 - 6Peter Hopkins, Jared Cohen Jan. 15, 2008
- 4 - 7Deborah Tannen Jan. 16, 2008
- 4 - 8Lou Dobbs, David Levy Jan. 17, 2008
- 4 - 9Allan Sloan, Eric Weiner Jan. 21, 2008
- 4 - 10Malcolm Gladwell, Andrew Young Jan. 22, 2008
- 4 - 11Stephen Colbert's Sport Report Jan. 23, 2008
- 4 - 12Debra Dickerson, Charles Nesson Jan. 24, 2008
- 4 - 13Marjane Satrapi, Rick Warren Jan. 28, 2008
- 4 - 14Joe Quesada, Alex Ross Jan. 29, 2008
- 4 - 15Carl Hiaasen, Frans de Waal Jan. 30, 2008
- 4 - 16Tim Harford, Andrew Napolitano Jan. 31, 2008
- 4 - 17Tony Campolo, Jacob Weisberg Feb. 04, 2008
- 4 - 18Angelo Falcon, Bob Dole Feb. 05, 2008
- 4 - 19Richard Brookhiser, Tad Devine Feb. 06, 2008
- 4 - 20Mark Moffett Feb. 07, 2008
- 4 - 21Aubrey de Grey, Philip Zimbardo Feb. 11, 2008
