Episode 1: Kathy Griffin, Sally Hawkins, Mike Birbiglia

Episode 2: Ron Howard, Jeffrey Dean Morgan, Gabe Dixon Band

Episode 3: Anne Hathaway, Jensen Ackles, Lenka

Episode 4: Michael Imperioli, Jason Mesnick, Zac Brown Band

Episode 5: Kiefer Sutherland, Malcolm Gladwell, David Cook

Episode 6: Mickey Rourke, Rowdy Roddy Piper, Michael Strahan, Morgan Murphy

Episode 7: Dustin Hoffman, jet pack pilot Eric Scott, Crooked X

Episode 8: Kevin James, Evan Rachel Wood, Delta Spirit

Episode 9: Sarah Silverman, Soulja Boy Tellem

Episode 10: Randy Jackson, Diablo Cody, Thriving Ivory

Episode 11: Brendan Fraser, Jonathan Goodwin, Blake Shelton

Episode 12: Tim Roth, Joan Rivers

Episode 13: Miranda Cosgrove, Eric McCormack, Boz Scaggs, Dov Davidoff

Episode 14: Adam Carolla, Brody Jenner, Disturbed

Episode 15: Andy Garcia, macaroni and cheese box collector Ian Golder, Kraak and Smaak

Episode 16: Kristen Bell, Carlos Bernard, Benji Hughes

Episode 17: John Cleese, Chris Ayres, the Bird and the Bee

Episode 18: Justin Long, Camilla Belle, Nick Kroll

Episode 19: Vanessa Minnillo, Morrissey

Episode 20: Teri Hatcher, Larry Wilmore, Jazmine Sullivan

Episode 21: Amy Brenneman, Steve-O, the Little Ones

Episode 22: Andy Dick, Grant Show, the Red Jumpsuit Apparatus

Episode 23: Demetri Martin, Marisa Tomei, Mishka, a special appearance by Matthew McConaughey

Episode 24: Johnny Knoxville, Trisha Helfer, Mark Seliger

Episode 25: Tyler Perry, Blues Traveler

Episode 26: Naomi Watts, Whitney Port, K'Naan

Episode 27: Rosie Perez, Danny McBride, Anya Marina

Episode 28: Dev Patel, Robin Roberts, Kinky

Episode 29: The Jonas Brothers, Jimmie Johnson, Darius Rucker

Episode 30: Don Rickles, Ben Sollee

Episode 31: Rob Lowe, Khloe Kardashian, Living Things

Episode 32: Calista Flockhart, John Michael Higgins, Nick DiPaolo

Episode 33: Evangeline Lilly, Jason Mesnick, New Kids on the Block

Episode 34: Charles Gibson, Lil' Wayne, Robyn

Episode 35: Bonnie Hunt, Nathan Fillion, Oren Lavie

Episode 36: Kate Walsh, Carla Gugino, Raphael Saadiq

Episode 37: Heidi Klum, Bryan Cranston, Chris Cornell

Episode 38: Jaime Pressly, animal trainer Kirstin McMillan, the Pretenders

Episode 39: David Hasselhoff, Eliza Dushku, Pendulum

Episode 40: Kristin Stewart, Dwayne Johnson, the Dream

Episode 41: "Dancing with the Stars" castoff Belinda Carlisle, Chandra Wilson, Streeter Seidell and Amir Blumenfeld, Young Dubliners

Episode 42: Andy Samberg, Ashley Scott, MSTRKRFT

Episode 43: John Cena, Christopher Mintz-Plasse, the Duke Spirit

Episode 44: Portia de Rossi, Melissa Rycroft, Motley Crue

Episode 45: "Dancing with the Stars" castoff Denise Richards, Zach Braff, Cheryl Hines, Charlie Wilson sits in with the band

Episode 46: John Stamos, Dr. Drew Pinsky, Blue October

Episode 47: Ozzy, Sharon, Jack and Kelly Osbourne, Bobby Cannavale, Todd Glass

Episode 48: Paul Giamatti, Jim Gaffigan, Keri Hilson featuring Lil Wayne

Episode 49: "Dancing with the Stars" castoffs Steve Wozniak and Holly Madison, Will Arnett, Michelle Rodriguez

Episode 50: Amy Poehler, Jordana Brewster, Les Claypool

Episode 51: Vin Diesel, Anna Faris, Eli Young Band

Episode 52: Ben Affleck, Lily Allen

Episode 53: Jorge Garcia, David Alan Grier, "Dancing with the Stars" castoff Steve-O, Mims

Episode 54: Christina Applegate, Mike Tyson, Dana Gould

Episode 55: Zac Efron, Patti Stanger, Franz Ferdinand

Episode 56: Six-year-old genius Pranav Veera, Pete Yorn

Episode 57: Billy Bob Thornton, "Dancing with the Stars" castoff Lawrence Taylor

Episode 58: Justin Timberlake, Eliza Coupe, the Whip

Episode 59: Channing Tatum, Elisha Cuthbert, Depeche Mode

Episode 60: Jamie Foxx, Elizabeth Mitchell

Episode 61: Michael J. Fox, "Dancing With the Stars" castoff Chuck Wicks, Asher Roth

Episode 62: Dominic Monaghan, J.J. Abrams, Bang Camaro

Episode 63: Brooke Shields, Balthazar Getty, Kumail Nanjiani

Episode 64: Matthew McConaughey, Kara DioGuardi, Jason Aldean

Episode 65: Zachary Quinto, "Dancing With the Stars" castoff Lil' Kim, 11-year-old Scrabble champions Andy Hoang and Erik Salgado

Episode 66: David Spade, Zoe Saldana, Black Eyed Peas

Episode 67: Hugh Jackman, John Cho, Flo Rida

Episode 68: Chris Pine, Aziz Ansari, Scott Weiland

Episode 69: Paula Abdul, "Dancing With the Stars" castoff Ty Murray, Todd Glass

Episode 70: Matthew Fox, Benjamin McKenzie, Ciara

Episode 71: Adrien Brody, Steve "Lips" Kudlow and Robb Reiner, the Airborne Toxic Event

Episode 72: Eminem, Mike Tyson

Episode 73: Ben Stiller, Shawn Johnson and Mark Ballas, No Doubt

Episode 74: Tim Daly, Common, Busta Rhymes

Episode 75: Hank Azaria, Anton Yelchin, Eminem

Episode 76: Danny McBride, Nia Vardalos, Taking Back Sunday

Episode 77: Heather Graham, Lance Krall, Katie Melua

Episode 78: Thomas Haden Church, Ed Helms, 311

Episode 79: Paris Hilton, Ken Jeong, Blink 182

Episode 80: Artie Lange, Adam Perry Lang, No Doubt

Episode 81: Ty Pennington, David Sedaris, the Jonas Brothers

Episode 82: Roseanne Barr, Ryan Kwanten

Episode 83: Kathy Griffin, Ramon Rodriguez, Ben Harper

Episode 84: Kobe Bryant, Derek Fisher

Episode 85: David Arquette, Jill Wagner, Linkin Park

Episode 86: Josh Duhamel, Tracy Hutson, Bat For Lashes

Episode 87: Shia LaBeouf, June Diane Raphael, Eric Hutchinson

Episode 88: Megan Fox, David Cross, Phoenix

Episode 89: Samuel L. Jackson, Jamie-Lynn Sigler, Sean Patrick McGraw

Episode 90: Larry King, Marissa Miller, Chester French

Episode 91: Josh Lucas, Terrell Owens, Pitbull

Episode 92: Teri Hatcher, Danica Patrick, Daughtry

Episode 93: Seth Green, "Bachelorette" Jillian Harris, Zac Sunderland

Episode 94: Zooey Deschanel, Rev. Al Sharpton, Jewel

Episode 95: Katherine Heigl, David and Shaun Cassidy, La Roux

Episode 96: Tom Arnold, "Trailer Park Boys" Rob Wells, John Paul Tremblay and Mike Smith

Episode 97: Leslie Mann, Eric Winter, Parachute

Episode 98: Jonah Hill, Mary McCormack, Ryan Sheckler

Episode 99: Seth Rogen, Melissa Sagemiller, Jack's Mannequin

Episode 100: Anne Heche, Aubrey Plaza, Diane Birch

Episode 101: Ashton Kutcher, Nigel Lythgoe, the Script

Episode 102: Vanessa Hudgens, Eli Roth, Miike Snow

Episode 103: Sienna Miller, Dave Salmoni, Doug Benson

Episode 104: Quentin Tarantino, Rachel Nichols, pizza throwers Chris Green, Sam Niemeier, and Ryan Larose

Episode 105: Gordon Ramsay, Rob Zombie, Friendly Fires

Episode 106: Robin Williams, Bobcat Goldthwait, Matt & Kim

Episode 107: Shaquille O'Neal, Selena Gomez, Darius Rucker

Episode 108: Dylan McDermott, B.J. Novak, the Dead Weather

Episode 109: Kyra Sedgwick, Patton Oswalt, DataRock

Episode 110: Emile Hirsch, Amber Valletta, St. Vincent

Episode 111: Kathie Lee Gifford, Milo Ventimiglia, R. Kelly

Episode 112: Gerard Butler, Nate Berkus, Maxwell

Episode 113: Jennifer Connelly, Jeff Ross, Boys Like Girls

Episode 114: Kathy Griffin, Ryan Kwanten, Brendan Benson

Episode 115: Nick Cannon, Former Gov. Rod Blagojevich, White Lies

Episode 116: Julie Bowen, Rumer Willis, the Used

Episode 117: Eva Longoria Parker, Kelly Clarkson, a special appearance by Matt Damon and Joel McHale

Episode 118: David Alan Grier, 10-year-old vacuum cleaner expert Gregory Evans, Pink

Episode 119: Jenna Elfman, Danny Pudi, Lives of Famous Men, a special appearance by Rachael Ray

Episode 120: Christian Slater, Ed O'Neill, Sofia Vergara, Shakira

Episode 121: David Duchovny, Carmelo Anthony, Kid Cudi

Episode 122: Courteney Cox, Jessica Capshaw, "Dancing with The Stars" castoff Ashley Hamilton

Episode 123: Rob Lowe, Lisa Lampanelli, pizza throwers Chris Green, Sam Niemeier and Ryan Larose, a special appearance by Tommy Lasorda

Episode 124: LeBron James & his high school basketball teammates, Esther Dean, Chris Bianco

Episode 125: Ricky Gervais, "Dancing with the Stars" castoff Kathy Ireland, Alice in Chains

Episode 126: Rebecca Romijn, Joseph Fiennes, Alice in Chains

Episode 127: Hayden Panettiere, Matthew Rhys, Joss Stone

Episode 128: Woody Harrelson, Whitney Port, Shinedown

Episode 129: Patricia Heaton, Debi Mazar, Tom DeLay, Gossip

Episode 130: Joel McHale, Richard Belzer, KISS

Episode 131: Kelsey Grammer, Stana Katic, Motorhead

Episode 132: Michael Moore, Malin Ackerman, the Backstreet Boys

Episode 133: Jack Black, “Dancing with the Stars” castoff Chuck Liddell, Cobra Starship

Episode 134: Jamie Foxx, Toby Keith

Episode 135: Taye Diggs, Kristin Cavallari, Harper Simon

Episode 136: Serena Williams, Dr. Drew Pinsky, Eric Church

Episode 137: Edward Norton, Paul Shaffer, the latest "Dancing with the Stars" castoff, the Sounds

Episode 138: Salma Hayek, Rico Rodriguez, Dead by Sunrise

Episode 139: John C. Reilly, Nene Leakes, Kim Zolciak, an archery demonstration by Randy Oitker, the Temper Trap

Episode 140: Terry Bradshaw, Catherine Keener, Echo & the Bunnymen

Episode 141: Dr. Mehmet Oz, “Dancing with the Stars” castoffs Melissa Joan Hart & Louie Vito, Morningwood

Episode 142: James Marsden, Atticus Shaffer, Flyleaf

Playing

Episode 143: Jason Schwartzman, Rod Stewart

Episode 144: Paris Hilton, Slipknot

Episode 145: Pamela Anderson, “Dancing with the Stars” castoffs Mark Dacascos & Michael Irvin, Manny “Pac-Man” Pacquiao, White Rabbits

Episode 146: Joshua Jackson, Big Bird, Ghostface Killah featuring Raheem DeVaughn

Episode 147: Jesse Williams, Florence + the Machine

Episode 148: Ted Danson, Khloe Kardashian, Lamar Odom, Chickenfoot

Episode 149: Chris O'Donnell, Bill Simmons, “Dancing with the Stars” castoff Aaron Carter, Amerie

Episode 150: Dominic Monaghan, Holly Hibner & Mary Kelly, Los Lonely Boys

Episode 151: Danny DeVito, Streeter Seidell & Amir Blumenfeld, Switchfoot

Episode 152: Sean “Diddy” Combs, Super Dave Osborne, Huey Lewis & the News

Episode 153: John Stamos, Emily VanCamp, the latest "Dancing with the Stars" castoff, OneRepublic

Episode 154: 50 Cent, Marv Albert

Episode 155: Carrie Underwood, Heidi Montag & Spencer Pratt

Episode 156: Robert Pattinson, Kristen Stewart, Taylor Lautner, Death Cab for Cutie

Episode 157: Heidi Klum, Ron Artest, Weezer

Episode 158: Charlize Theron, Regis Philbin, "Dancing with the Stars" winner Donny Osmond, Wolfmother

Episode 159: Charles Barkley, Peter Facinelli, Leona Lewis

Episode 160: Magic Johnson, Kellan Lutz, Trey Songz

Episode 161: Matt Dillon, Nikki Reed, Birdman featuring Jay Sean

Episode 162: Jake Gyllenhaal, Ashley Greene, Honor Society

Episode 163: Don Rickles, Anika Noni Rose, Band of Skulls

Episode 164: Pee-wee Herman, Jackie, Tito & Marlon Jackson, Passion Pit

Episode 165: William Shatner, animal trainer Kirstin McMillan, Jay Sean

Episode 166: Steven Seagal, Eddie Pepitone

Episode 167: Ray Romano, Kim Kardashian, the Mighty Mighty Bosstones

Episode 168: Zach Braff, Nigel Lythgoe, Michael McDonald

Episode 169: Ty Pennington, 8-year-old Chicken Whisperer Joshua McCarthy, Norah Jones

Episode 170: Rachel McAdams, Johnny Galecki, Allison Iraheta

Episode 171: John Krasinski, James Cameron, Mary J. Blige