Episode 1: Howie Mandel, Amanda Bynes, Emmylou Harris

Episode 2: Jamie Foxx, Tim Gunn, Paolo Nutini

Episode 3: Dane Cook, Ali Larter, LCD Soundsystem

Episode 4: Jessica Alba, D.L. Hughley, Cold War Kids

Episode 5: Hugh Laurie, Sherri Shepherd, The Editors

Episode 6: Dwayne "The Rock" Johnson, Dennis Kucinich, Diana Krall

Episode 7: Jennifer Love Hewitt, Jeff Corwin, Reba McEntire with Vince Gill

Episode 8: Steve Carell, Madison Pettis, Bright Eyes

Episode 9: Ben Stiller, Tony Snow, Raul Midon

Episode 10: Teri Hatcher, Kevin McKidd, Queen Latifah

Episode 11: Patricia Heaton, Emeril Lagasse, Tori Amos

Episode 13: Tom Selleck, Carlos Mencia, Bobbie and Willie Nelson

Episode 14: John Larroquette, Chelsea Handler, Matchbox Twenty

Episode 15: Cate Blanchett, Tyler Perry, Annie Lennox

Episode 16: Ben Affleck, Jim Norton, The Shins

Episode 17: Jaime Pressly, Brady Barr, Blue Man Group

Episode 18: Dana Carvey, Malin Akerman, Plain White T's

Episode 19: Joaquin Phoenix, Gordon Ramsay, Vanessa Carlton

Episode 20: Christina Applegate, Bill O'Reilly, Alicia Keys

Episode 21: James Spader, Lara Logan, Steve Byrne

Episode 22: Reese Witherspoon, David Koechner, PJ Harvey

Episode 23: Sen. Barack Obama, Orny Adams, Keith Urban

Episode 24: Jerry Seinfeld, Amy Ryan, Evanescence

Episode 25: Halle Berry, Greg Grunberg, Dwight Yoakam

Episode 26: Russell Crowe, Jenna Bush, Carrie Underwood

Episode 27: Tom Cruise, Rep. Ron Paul, Sex Pistols

Episode 28: Eva Mendes, Marjorie Johnson, Barry Manilow

Episode 29: Denzel Washington, Dave Salmoni, LeAnn Rimes

Episode 30: Steve Carell, Manny Ramirez, Backstreet Boys

Episode 31: Gov. Mike Huckabee, Emeril Lagasse, Chingy

Episode 32: Howie Mandel, Jason Lewis, Joe Nichols

Episode 33: Animals With Jarod Miller, John Caparulo, Blake Lewis

Episode 34: Ron Paul, Christopher Titus, Shakira

Episode 35: Pamela Anderson, Mary J. Blige

Episode 36: Jules Sylvester and animals, Maria Bartiromo, Finger Eleven

Episode 37: Jimmy Kimmel, Elon Gold, OneRepublic

Episode 38: Arsenio Hall, Melanie Metz & Peggy Willenberg, Seether

Episode 39: Marilu Henner, Brady Barr, Jordan Sparks

Episode 40: Bill Maher, Carrie Ann Inaba & Bruno Tonioli, Taylor Swift

Episode 41: Chris Matthews, John Roy, Jill Scott

Episode 42: D.L. Hughley, Joe Ligotti, Sara Bareilles

Episode 43: Mitt Romney, Ryan Sheckler, Jonas Brothers

Episode 44: Simon Cowell & Ryan Seacrest, Tavis Smiley, Shaggy

Episode 45: David Gregory, Performing Birds, Puddle Of Mudd

Episode 46: Adam Carolla, Richard Roeper, Shooter Jennings

Episode 47: Animals With Julie Scardina, Chelsea Handler, Buckcherry

Episode 48: Hulk Hogan, Mad Scientist David Willey, Natasha Bedingfield

Episode 49: Chazz Palminteri, Alison Sweeney, Dierks Bentley

Episode 50: Lester Holt, Blue Ribbon Baker Marjorie Johnson, Raheem DeVaughn

Episode 51: Animals with Dave Salmoni, Tom Green, Maroon 5

Episode 52: Sen. John McCain, Rudy Giuliani, Shelby Lynne

Episode 53: Tom Brokaw, Terrell Owens, Graham Colton

Episode 54: Dan Rather, Mike Rowe, Josh Kelley

Episode 55: Insects with Brent Karner, Stephen Baldwin, J. Holiday

Episode 56: Frank Caliendo, Chimp Rescuer Eugene Cussons, Flo Rida

Episode 57: Arsenio Hall, Paula Deen, James Blunt

Episode 58: Brian Williams, Ahmed Ahmed, Enrique Iglesias

Episode 59: Larry the Cable Guy, Bobby Knight, Andrea Bocelli

Episode 60: Larry the Cable Guy, Bruno Tonioli, Glen Hansard & Markéta Irglová

Episode 61: Joan Embery and Animals, Larry the Cable Guy, Mika

Episode 62: Russell Crowe, Larry the Cable Guy, Willie Nelson

Episode 63: Kristen Chenoweth, Russell Peters, Lifehouse

Episode 64: Reese Witherspoon, Alex Cambert, Gary Allan

Episode 65: Will Ferrell, Hayden Christensen, The Hives

Episode 66: Garth Brooks, Christina Ricci

Episode 67: Heidi Klum, James McAvoy, John Fogerty

Episode 68: Colin Farrell, Bill O'Reilly, Herbie Hancock

Episode 69: Eric Bana, Catherine O'Hara, Tift Merritt

Episode 70: Dennis Quaid, David Koechner, Lupe Fiasco

Episode 71: Billy Ray Cyrus, Miley Cyrus, Brooke Shields

Episode 72: Wanda Sykes, Bryan Cranston, Cat Power

Episode 73: Dave Salmoni and Animals, Patricia Arquette, The Punch Brothers

Episode 74: Dominic Monaghan, Ethan Bortnick, Sheryl Crow

Episode 75: America Ferrera, Bob Saget, The Blind Boys of Alabama

Episode 76: Bill Cosby, Novak Djokovic, Landon Pigg

Episode 77: Howie Mandel, Minnie Driver

Episode 78: Gordon Ramsay

Episode 79: Kate Beckinsale, Carlos Mencia, The Bravery

Episode 80: Terry Bradshaw, James Carville & Mary Matalin, Michael McDonald

Episode 81: Ryan Phillippe, Lisa Lampanelli, Jim Lauderdale

Episode 82: John Edwards, Leslie Mann, Nada Surf

Episode 83: Adam Carolla, Geraldo Rivera, The Black Crowes

Episode 84: Peter O'Toole, Katt Williams, Leona Lewis

Episode 85: Abigail Breslin, Seth Meyers, Steve Earle

Episode 86: John Krasinski, Joe Torre, José González

Episode 87: Conan O'Brien, Anderson Cooper, Allison Moorer

Episode 88: John Larroquette, Kid Inventors, k.d. lang

Episode 89: Jodie Foster, Cedric the Entertainer, Lili Haydn

Playing

Episode 90: Mike Huckabee; Emeril Lagasse; Chingy

Episode 91: Steve Carell, Kathie Lee Gifford, Ani DiFranco

Episode 92: Sen. Hillary Clinton, Patton Oswalt, Ferras

Episode 93: David Spade, Nora Hardwick, Ben Lee

Episode 94: Pamela Anderson; Mary J. Blige

Episode 95: Jules Sylvester; Maria Bartiromo; Finger Eleven

Episode 96: Jimmy Kimme; Elon Gold; OneRepublic

Episode 97: Keanu Reeves, Chelsea Handler, The Redwalls

Episode 98: William Shatner, Tricia Helfer, Ryan Bingham

Episode 99: Mark Harmon, Corbin Maxey, Ray J

Episode 100: Brad Garret; Ingrid Michaelson; John Melendez

Episode 101: Charles Barkley, The Young@Heart Chorus

Episode 102: Ewan McGregor, John Cho & Kal Penn, Seether

Episode 103: Tracey Ullman, Jason Taylor, Flogging Molly

Episode 104: Dave Salmoni, Norm MacDonald, Ashlee Simpson

Episode 105: Julia Louis-Dreyfus, Jason Segel, Goldfrapp

Episode 106: Patrick Dempsey, Ed Begley Jr., Tegan and Sara

Episode 107: Gov. Arnold Schwarzenegger, Marilu Henner, Old 97's

Episode 108: Hugh Laurie, Doug Fine, Prince

Episode 109: Helen Hunt, Gov. Bobby Jindal, Duffy

Episode 110: Dr. Phil McGraw, the Lopez family, Natasha Bedingfield

Episode 111: Cindy McCain, Ed Helms, Augustana

Episode 112: Robin Williams, Terrence Howard, Serj Tankian

Episode 113: Sally Field, Jesse Ventura, Sleepercar

Episode 114: Robert Downey Jr., Carlos Mencia, Rascal Flatts

Episode 115: Julie Scardina and animals, Christina Ricci, KT Tunstall

Episode 116: Former President Jimmy Carter, Jon Favreau, P.O.D.

Episode 117: Jenna Fischer, Robert Schimmel, Trace Adkins

Episode 118: Harrison Ford, William Moseley, Carly Simon

Episode 119: Jack Black, Clay Aiken

Episode 120: Evangeline Lilly, Ben Barnes, Switchfoot

Episode 121: Rainn Wilson, Howard Dean, Kate Nash

Episode 122: Dana Delany, Adam Carolla, Dwight Yoakam

Episode 123: Matthew Fox, Kathleen Edwards

Episode 124: Simon Cowell, Rob Schneider, Josh Groban

Episode 125: Sylvester Stallone, Irma & Ray Ziff, Jason Mraz

Episode 126: Adam Sandler, Hilary Duff, Al Green

Episode 127: Laura & Jenna Bush, David Cook, Tristan Prettyman

Episode 128: Terry Bradshaw, Turkey Baster Virtuoso Ray Sanders, Colbie Caillat

Episode 129: William Shatner, Chelsea Handler, Newton Faulkner

Episode 130: Liv Tyler, Judd Apatow, Usher

Episode 131: Jeff Foxworthy, Arianna Huffington, N.E.R.D.

Episode 132: Dave salmoni; Patricia Arquette; Punch Brothers

Episode 133: Will Smith, Pete Sampras, Ed Harcourt

Episode 134: Russel Brand, Bill Engvall, Aimee Mann

Episode 135: Justin Timberlake, Karen Allen, Sheryl Crow

Episode 136: Dana Carvey, Spencer Breslin, Priscilla Ahn

Episode 137: Mike Myers, Abigail Breslin, David Cook

Episode 138: Larry the Cable Guy, Bob Costas, Ashanti

Episode 139: Anne Hathaway; Gabriel Iglesias; Amos Lee

Episode 140: Ryan Phillippe; Lisa Lampanelli; Jim Lauderdale

Episode 141: Dwayne "The Rock" Johnson, Tom Papa, Against Me!

Episode 142: Wanda Sykes, James McAvoy, Duffy

Episode 143: Bette Midler, Al Roker

Episode 144: Selma Blair, Kevin Nealon, Steve Tyrell

Episode 145: Aaron Eckhart, Dara Torres, Los Lonely Boys

Episode 146: Animal Expert Jarod Miller, David Koechner, Sara Bareilles

Episode 147: Conan O'Brien; Anderson Cooper; Allison Moorer

Episode 148: John Larroquette; Kid Inventors; K.D. Lang

Episode 149: Jodie Foster; Cedric the Entertainer; Lili Hayden

Episode 150: David Beckham; Sherri Shepherd; B-52s

Episode 151: Steve Carell; Kathie Lee Gifford; Ani LiFranco

Episode 152: Hillary Clinton; Patto Oswalt; Ferras

Episode 153: David Spade; Nora Hardwick; Ben Lee

Episode 154: Thomas Haden Church; Sig & Edgar Hansen; Jimmy Eat World

Episode 155: Dennis Quaid; Russell Brand; Brett Dennen

Episode 156: Ellen Page; Donny & Marie Osmond; Angie Stone

Episode 157: Keanu Reeves; Chelsea Handler; The Redwalls

Episode 158: William Shatner; Tricia Helfer; Ryan Bingham

Episode 159: Mark Harmon; Corbin Maxey; Ray J

Episode 160: Brad Garrett; John Melendez; Ingrid Michaelson

Episode 161: Charles Barkley; Young @ Heart Chorus

Episode 162: Rosie Perez, Robin Thicke

Episode 163: Bill Cosby, Emma Stone, John Mellencamp with T Bone Burnett

Episode 164: Ben Stiller, Jonas Brothers

Episode 165: Robert Downey Jr., Anna Faris, Toby Keith

Episode 166: Jack Black, Pillsbury Bake-Off-Champ Carolyn Gurtz, Conor Oberst

Episode 167: Nick Nolte, Carrot Top, Solomon Burke

Episode 168: Hugh Laurie; Doug Fine; Prince

Episode 169: Sen. John McCain, Dara Torres, Juliana Hatfield

Episode 170: Norm MacDonald, Nastia Liukin, B.B. King

Episode 171: Bill Maher, Henry Cejudo, Low vs Diamond

Episode 172: Gordon Ramsay, Natalie Coughlin, Missy Higgins

Episode 173: Arsenio Hall, Shawn Johnson, Chuck Berry

Episode 174: Russell Brand, Eva Longoria Parker, Ingrid Michaelson

Episode 175: Billy Bob Thornton, Ethan Bortnick, Brian Wilson

Episode 176: Howie Mandel, Sanya Richards, The Game

Episode 177: Jenna Fischer; Robert Schimmel; Trace Adkins

Episode 178: Harrison Ford; William Moseley; Carly Simon

Episode 179: Jules Sylvester, Annette Bening, Leona Lewis

Episode 180: Matthew McConaughey, T. Boone Pickens, Al Green

Episode 181: Jamie Lee Curtis, Jerome Bettis, Alejandro Escovedo

Episode 182: Hugh Laurie, Dame Edna, Raphael Saadiq

Episode 183: Matthew Fox; Kathleen Edwards

Episode 184: Simon Cowell; Rob Schneider; Josh Groban

Episode 185: Sylvester Stallone; Irma & Ray Ziff; Jason Mraz

Episode 186: Adam Sandler; Hillary Duff; Al Green

Episode 187: Laura & Jenna Bush; David Cook; Tristan Prettyman

Episode 188: Terry Bradshaw; Ray Sanders; Colbie Caillat

Episode 194: Ellen Degeneres; Jerry O'Connell; Jazmine Sullivan