Glenn Greenwald, Jennifer Granholm, Steve Schmidt, James Carville, and (a very stoned) Mary Matalin.

Erin Brockovich, Willie Nelson, Josh Barro, Governor Howard Dean, and Carly Fiorina.

Interviewee: John Ridley ("12 Years a Slave" screenwriter).

Governor Charlie Christ, Tom Colicchio, Alicia Menendez, S.E. "one girl, two" Cupp, and P.J. O'Rourke.

"Dirty Wars" Docu-maker Jeremy Scahill, "Daily Dish" blogger Andrew Sullivan, "Big Bang Theory" star and vegan author Mayim Bialik, and "Going Solo" author Eric Klinenberg.

Michelle Alexander, Charles Cooke, Jane Harman, Rachel Maddow, and Steve Coogan.

Christopher Leonard, Austan Goolsbee, Margaret Hoover, William Kristol, and Bruce Dern.

Alan Weisman, Andrew Sullivan, Salman Rushdie, Amy Chua, and Seth MacFarlane.

Bill Maher was joined by Errol Morris, Sheila Bair, Keith Ellison & Simon Schama and Shane Smith.

Bill Maher was joined by Jimmy Carter, Josh Gad, W. Kamau Bell, Neera Tanden and Rick Lazio.

Paul Watson (Captain), Nas (Hip Hop icon), Alex Wagner (MSNBC host), Tom Davis (R-VA), and Carrie Sheffield (Forbes columnist).

Bill Maher was joined by Nadya Tolokonnikova and Masha Alekhina of Pussy Riot and their translator Pyotr Verzilov, Ana Marie Cox, Rep. Duncan Hunter, Rob Lowe and Matt Taibbi.

Bill Maher was joined by Tom Steyer, John Avlon, Christine Quinn, Charles Murray and Annabelle Gurwitch.

Musician Ziggy Marley, Ex-NBA Player Kareem Abdul-Jabbar, Lt. Governor Gavin Newsom (D-CA), "Blood Will Out" Author Walter Kirn, and Financial Consultant Monica Mehta.

Bill special guests tonight include Arianna Huffington, Dinesh D'Souza, Baratunde Thurston, Matt Welch & Sister Simone Campbell.

Comedian and Actor Kevin Nealon, Ex-Governor Brian Schweitzer (D-MN), from "Fed Up" Dr. Robert Lustig, GOP Pollster Kellyanne Conway and Author of "Every Nation for Itself" Ian Bremmer.

Bill's special guests tonight include Anna Deavere Smith, David Frum, Jose Antonio Vargas, Michael Smerconish & Sarah Silverman.

Bill's special guests tonight include Anthony Weiner, Jim Geraghty, John Waters, Nicolle Wallace & Ralph Reed.

EPA Head Gina McCarthy, MSNBC Co-Host Krystal Ball, Novelist Richard Clarke, Comedian Carol Leifer and Conservative Blogger Tom Rogan.

"No Place to Hide" Author Glenn Greenwald, Linkin Park's Michael Shinoda, Atlantic Journalist Ta-Nehisa Coates, I.A.V.A. Founder Paul Rieckhoff, and Conservative Pollster Kristen Soltis.

MSNBC's Joy Reid, Journalist Bobby Ghosh, Radio Host Andy Dean, "Missing Microbes" Author Dr. Martin Blaser, and Graphic Novelist Max Brooks.

Author Sandra Tsing-Loh, Pulitzer prize-winner Ron Suskind, Rep. Donna Edwards (D-MD), National Review's Reihan Salam, and Jason Box.

Ex-Rep. Jane Harman (D-CA), From "Star Trek" George Takei, ESPN's Five Thirty Eight Statistician Nate Silver, Dialy Caller Senior Editor Jamie Weinstein and Rev. Dr. William Barber II.

"Cosmos" star Neil deGrasse Tyson, Democracy Now's Amy Goodman, Freedomworks' Matt Kibbe, GOP Strategist Hogan Gidley.

Bill's special guests tonight include Ralph Nader, Doug Heye, Barbara Lee, Andrew Ross Sorkin and Chris Hardwick.

Live from Washington D.C.

Guests include comedy legend Jerry Seinfeld, Ex-Speaker of the House Nancy Pelosi (D-CA) followed by a live stand-up special.

Ex-Secretary of State and General Colin Powell, Rep. Jack Kingston (R-GA), The Nation's Editor-in-Chief Katrina Vanden Heuvel, Matthew Segal and actor Wendell Pierce.

General Anthony Zinni, Filmmaker Alexandra Pelosi, "This Changes Everything" author Naomi Klein, New York Times columnist Charles Blow, and Conservative John Feehry.

This weeks guests include Oscar winner Ben Affleck, Senator Elizabeth Warren (D-MA), New York Times Op-Editor Nicholas Kristoff, Ex-RNC Chair Michael Steele, and "Waking Up" author Sam Harris.

This weeks guests include Senator Kirsten Gillibrand (D-NY), Representative Barbara Lee (D-CA), Ex-British Foreign Secretary David Miliband, and "Atlantic" Senior Editor David Frum.

"Black Prophetic Fire" Author Dr. Cornel West, Conservative Commentator Mary Matalin, "Daily Beast" Editor-In-Chief John Avlon, Chloe Maxmin and James Risen.

Actress and "Food Chain" EP Eva Longoria, Author and General (Ret.) Wesley Clark, Senator Angus King (I-ME), Journalist Rula Jebreal, and Actor Kal Penn.

Senator Bernie Sanders (I-VT), "Comeback" star Lisa Kudrow, Washington Post's Robert Costa, Daily Beast's Kristen Soltis Anderson.

Rep. Rand Paul (R-KY), Comedy Legend Martin Short, Founding Editor of "The Dish" Andrew Sullivan, CNN Political Contributor Margaret Hoover, and Investigative Journalist Jeremy Scahill.

"The Interview" star Seth Rogen, MSNBC "Hardball" host Chris Matthews, Monty Python Alum & "So Anyway..". author John Cleese, Canadian MP Chrystia Freeland and "News One Now" host Roland Martin.