Guests: Journalist David Frum, comedian Eddie Izzard, author Gore Vidal, former governor of Vermont Howard Dean, businessman Russell Simmons

Topics: Madrid bombings, renewal of the Patriot Act, young voters, voting machines

Guests: Actor Jason Alexander, Andrew Sullivan, Arianna Huffington, Howard Dean and Pat Buchanan

Topics: Republican National Convention, Iraq

Guests: Singer Alanis Morissette, former Rep. Jim Rogan, Reverend Jesse Jackson, Dr. Howard Dean, radio show host Garrison Keillor

Topics: Election debates, media in politics, Iraq

Guests: Ex-gov. Howard Dean (D-VT), comedian Dana Gould, writer Randy Cohen, author Bethany McLean, ex-CIA agent Robert Baer

Topics: Obama's first 100 days, torture memos, economy, gun control, environment and global warming, children's health

GOPAC president David Avella; former Vt. Gov. Howard Dean; political strategist Kristen Soltis; House Democratic leader Nancy Pelosi; Sen. Jon Tester (D-Mont).

Interviewee: Erin Brockovich

Panelists: Josh Barro, Howard Dean, Carly Fiorina

Panel Guest: Willie Nelson

Topics: 2014 Elk River chemical spill and coal mining, Republicans and women issues, Obamacare, Richard Sherman's outburst after game against the San Francisco 49ers, Obama's inconsistent policies about marijuana, poverty and income inequality, 2014 Winter Olympics and Vladimir Putin's comments on LGBT people.

Ex-Governor Howard Dean (D-VT), comedian and "Black and White" actor Bill Burr, "America in Retreat" author Bret Stephens, Washington Post's Nia-Malika Henderson, and The Atlantic's James Fallows.