Guests: Filmmaker Spike Lee, music legend Elvis Costello, blogger Markos Moulitsas, fmr. Sen. Max Cleland, author/scholar Vali Nasr, and columnist Christopher Hitchens

Topics: Katrina, war on terror

Guests: Fmr CIA operative Valerie Plame and her husband, fmr Amb Joe Wilson; political blogger Markos Moulitsas; NPR host Alison Stewart (radio); actor/comedian Martin Short ; via satellite, author Jeremy Scahill

Topics: CIA leak scandal, Hillary Clinton's debate performance and Democrats' campaign issues, Blackwater USA, Mukasey confirmation

Guests: Prof Cornel West, blogger Markos Moulitsas Zúniga, writer/activist Ayaan Hirsi Ali, journalist Jeremy Scahill (election correspondent); via satellite, MSNBC host Chris Matthews

Topics: Pennsylvania primary and Democratic debate, Pope's visit to U.S., oil prices and worldwide food shortages, polygamy and raid on Texas compound

Guests: Joe Scarborough, actor Jason Alexander, actress/playwright Anna Deavere Smith, Gov. Brian Schweitzer (D-MT), Markos Moulitsas.

Topics: Sonia Sotomayor confirmation hearings, racism and the Republican Party, clean coal electricity debate, health care reform in the United States, recent sex scandals involving politicians, Israeli-Palestinian conflict, death of Michael Jackson, drug use in the United States, death of Walter Cronkite (news broke shortly before tonight's show began), 40th anniversary of the Apollo Moon Landing

Guests: Activist Al Sharpton, columnist Markos Moulitsas, musician John Legend, Dana Loesch, columnist Dan Neil

Topics: Bill O'Reilly, Tea Party movement, 2010 Craziest Candidate Countdown, electric cars, education, Brett Favre

Bill interviews Rep. Adam Kinzinger about his recent Washington Post op-ed urging Senate Republicans to convict Donald Trump. For the panel discussion, he is joined by political blogger Markos Moulitsas and MSNBC Political Analyst Steve Schmidt.