Frank Caliendo

Is that John Madden, Dr. Phil, Charles Barkley, Robin Williams, Al Pacino, Bill Clinton and George W. Bush in the studio at the same time? No, it's just comedian and impressionist Frank Caliendo, but we can see where you'd be fooled. Caliendo was the star of the TBS show, "Frank TV," has appeared on a number of late night programs, had his own Vegas show for many years, and is the new comedic component of ESPN's Sunday NFL Countdown. Follow Frank on facebook and twitter.

Dr. Will Miller

Long time friend of the show, Dr. Will Miller, is an ordained minister, former standup comedian, keynote speaker, teacher and full-time therapist at a major University, yet somehow he still finds time to write books including Why We Watch and Refrigerator Rights (the latter of which has just recently been re-released with an all new chapter and updated research.) He's also the formorst expert on how classic television secretly revals the inner stuggles in all of us. Meaning, while you watch shows like "Mr. Ed" and "Bewitched" to get a few laughs, he's looking to find out what's going on in that messed up brain of yours. Follow Dr. Will on twitter.

Scott Dunn

Scott Dunn is a stand-up comedian, a novelist, a father of two, and a husband of one. He's also a full-time history buff, and famous for his roasts of famous historical figures and events. He also occasionally calls in with History Lessons and Quizes, which means if you see his name on the guest board, you'd better start studying. In his spare time (when he's got any) he writes jokes for a number of shows including "Are You Smarter Than a 5th Grader." And that's a little bit about Scott Dunn.

Lewis Black

He's indignant, he's exasperated, he's "America's foremost commentator on everything," he's comedian Lewis Black. Along with stand-up comedy, Black is also an actor, playwright, Broadway star, makes regular appearances on "The Daily Show With Jon Stewart" and "Late Night with Conan O'Brien," hosted the Comedy Central show "Root of All Evil," wrote the book I'm Dreaming of a Black Christmas, and is a Grammy Award winner. And somehow through all that, he still finds time to perform stand-up, and is currently on his aptly named "The Rant is Due" tour. Follow Lewis on Facebook and twitter.