Guests: Fmr Rep Harold Ford, Jr., actor/activist Sean Penn, comedian Garry Shandling; via satellite, fmr Gov Tommy Thompson and CNN's Dr. Sanjay Gupta

Topics: Republican presidential debate, State Dept terror statistics, anniversary of "Mission Accomplished" speech, "D.C. Madam" scandal, food safety, Hurricane Katrina aid

Topics: TV host Phil Donahue, columnist Arianna Huffington, comedian Garry Shandling, Rolling Stone writer Matt Taibbi (election correspondent); via satellite, economist Jeffrey Sachs

Guests: Earth Day and demand for resources, Pennsylvania primary results, tax rebate checks, extension of veterans' benefits, Democratic campaign tactics

Guests: Actor Alec Baldwin, reporter Christiane Amanpour, and comedian Garry Shandling; via satellite, journalist Bob Woodward

Topics: Bush's legacy, VP debate, Palin's performance, bailout bill, future of the country

Guests: Rep. Alan Grayson (D-FL) , Actor Alec Baldwin, comedian and actor Garry Shandling, Hardball host Chris Matthews, Maryland governor Martin O'Malley

Topics: Balloon Boy incident, Afghanistan, Al Qaeda, health care reform, H1N1 vaccination concerns, ongoing efforts to repeal Don't Ask, Don't Tell, sexual harassment in the military, Rush Limbaugh's failed bid to buy the St. Louis Rams, steroid use in professional sports