Episode 1 | Episode #4.1

Guests: Sen. Russ Feingold (D-WI), commentator Fred Barnes, actor Eddie Griffin, reporter Helen Thomas, Iraq advisor Dan Seno.

Episode 2 | Episode #4.2

Guests: actor Danny Glover, fmr. Sen. Gary Hart, author Irshad Manji, Rep. Heather Wilson, and columnist Nicholas Kristo

Episode 3 | Episode #4.3

Guests: Comedian D. L. Hughley, editor/journalist Graydon Carter, correspondent Dana Priest, fmr.

Episode 4 | Episode #4.4

Guests: Feminist Gloria Steinem, actor Larry Miller, editor Ramesh Ponnuru, baseball's Pete Rose, reporter John Burn.

Episode 5 | Episode #4.5

Guests: REM.'s Michael Stipe, actor/comedian Richard Belzer, Rep. Ileana Ros-Lehtinen.

Episode 6 | Episode #4.6

Guests: Actor Jason Alexander, author/theologian Reza Aslan, Rep. Jack Kingston (R-GA), reporter Michael Ware, talk show host Tavis Smile.

Episode 7 | Episode #4.7

Guests: Actor Robert Wuhl, actor Seth Green, author Erica Jong, Rep. Dana Rohrabacher, anchorman Jorge Ramo.

Episode 8 | Episode #4.8

Guests: Actor Ben Affleck, Sen. Joe Biden, correspondent Bill Sammon, author/former Republican strategist Kevin Phillips, Rep.

Episode 9 | Episode #4.9

Guests: Commentator Heather Higgins, Gen. Anthony Zinni, editor/publisher Mortimer Zuckerman, sports commentator Stephen A.

Episode 10 | Episode #4.10

Guests: Actor/director George Clooney, actor Ian McKellen, Rep. Barney Frank, correspondent Michel Martin, and historian Victor Davis Hanso.

Episode 11 | Episode #4.11

Guests: Actor Bradley Whitford, Fmr. PM of Canada Kim Campbell, fmr. Gov. Jim Gilmore, Gen. Wesley Clark, and Sen. Mel Martine

Episode 12 | Episode #4.12

Guests: Fmr. Sec. of State Madeleine Albright, singer/songwriter John Legend, national security expert Richard Clarke, academic Cornel West and Fox News show host John Gibso.

Episode 13 | Episode #4.13

Guests: Filmmaker Spike Lee, music legend Elvis Costello, blogger Markos Moulitsas, fmr.

Episode 14 | Episode #4.14

Guests: Magician Penn Jillette, Rep. Darrell Issa, scholar Mary Frances Berry; via satellite, intellectual Fouad Ajami and actor Harry Anderso.

Episode 15 | Episode #4.15

Guests: Author P. J. O'Rourke, Salon.com editor Joan Walsh, singer Rob Thomas; via satellite, former Israeli prime minister Benjamin Netanyahu and NBC News correspondent David Gregor

Episode 16 | Episode #4.16

Guests: Feminist icon Gloria Steinem, homeland security expert Clark Ervin, actor Michael McKean.

Episode 17 | Episode #4.17

Guests: Actor Bradley Whitford, Fox News contributor Sandy Rios, author Reza Aslan.

Episode 18 | Episode #4.18

Guests: From Washington, DC: Sens. John Kerry and Lincoln Chafee; Rep. Ileana Ros-Lehtinen, counter-terrorism expert Richard Clarke, comedian/actor Robin Williams, journalist Chris Matthew.

Episode 19 | Episode #4.19

Guests: Journalist Lou Dobbs, Danielle Pletka of American Enterprise Institute, actor Ben Affleck.

Episode 20 | Episode #4.20

Guests: Gov. Bill Richardson, Rep. Barney Frank, actor Jason Alexander, Stephen Moore of The Wall Street Journal.

Episode 21 | Episode #4.21

Guests: Journalist Andrew Sullivan, politician Christine Todd Whitman, singer Harry Belafonte.

Episode 22 | Episode #4.22

Guests: Actor Alec Baldwin, Rep. Jack Kingston, The Hill associate editor AB Stoddard.

Episode 23 | Episode #4.23

Guests: CNN's Candy Crowley, actor Rainn Wilson, author Salman Rushdie; via satellite, Sen.

Episode 24 | Episode #4.24

Guests: Guitarist Tom Morello of Audioslave, journalist Dana Priest, actor Richard Dreyfuss.