5x51 - The Cast of "It's Always Sunny in Philadelphia", In The Valley Below

February 23, 2015

The Cast of It's Always Sunny in Philadelphia and musical guest In The Valley Below

5x52 - Artie Lange, Victoria Justice, Daniel Sloss

February 24, 2015

Artie Lange, Victoria Justice and comedian Daniel Sloss

5x53 - Edward Norton, Melissa Rauch, Andrew Santino

February 25, 2015

Edward Norton, Melissa Rauch and comedian Andrew Santino

5x54 - Aziz Ansari, Cristela Alonzo

March 2, 2015

Aziz Ansari, Cristela Alonzo

5x55 - Norman Reedus, H. Jon Benjamin, Brandi Carlile

March 3, 2015

Norman Reedus, H. Jon Benjamin and musical guest Brandi Carlile

5x56 - Conan in Cuba

March 4, 2015

Conan in Cuba.

5x57 - Adam Sandler, Jonathan Banks, Broods

March 5, 2015

5x58 - Kevin Nealon, Maia Mitchell, Tobias Jesso Jr.

March 16, 2015

5x59 - Zachary Quinto, Kristen Schaal, OK Go

March 17, 2015

5x60 - Sean Penn, Sasha Alexander, Dana Gould

March 18, 2015

5x61 - Mindy Kaling, Brent Morin, Purity Ring

March 19, 2015

5x62 - Naomi Watts, Nick Kroll, Tweedy

March 23, 2015

5x63 - Kevin Hart, Roman Reigns, Incubus

March 24, 2015

5x64 - James Corden, Christopher Plummer, the Mavericks

March 25, 2015

5x65 - Will Ferrell, Ellie Kemper, Andy Woodhull

March 26, 2015

5x66 - Will Forte, Justin Willman, Mac DeMarco

March 30, 2015

5x67 - Keith Urban, Ludacris, Mark Little

March 31, 2015

5x68 - Ringo Starr, Rob Corddry, Waters

April 1, 2015

5x69 - Aubrey Plaza, Ron Funches, Calexico

April 2, 2015

5x70 - Billy Gardell, Zach Woods, Tinashe

April 6, 2015

5x71 - Ricky Gervais, Sen. Elizabeth Warren, Awolnation

April 7, 2015

5x72 - Kristen Stewart, Brian Wilson

April 8, 2015

5x73 - Amy Schumer, Kenny Smith, Joe Zimmerman

April 9, 2015

5x74 - Dave Mizejewski and animals, Chris D'Elia, Sturgill Simpson

April 13, 2015

5x75 - Timothy Olyphant, Angela Kinsey, David O'Doherty

April 14, 2015

5x76 - Ice Cube, Christina Tosi, Tame Impala

April 15, 2015

5x77 - Rosario Dawson, Barney Frank, Royal Blood

April 16, 2015

5x78 - Cedric the Entertainer, Fareed Zakaria, Marina and the Diamonds

April 27, 2015

5x79 - Nikolaj Coster-Waldau, Zach Woods, the Lone Bellow

April 28, 2015

5x80 - Matthew Perry, Rose McIver, Shawn Mendes

April 29, 2015

5x81 - January Jones, Dave Attell, Mike Vecchione

April 30, 2015

5x82 - Jeremy Renner, T.J. Miller, Mikal Cronin

May 4, 2015

5x83 - Chris O'Dowd, Alicia Vikander, Best Coast

May 5, 2015

5x84 - Helen Hunt, Nick Swardson, They Might Be Giants

May 6, 2015

5x85 - Chris Hardwick, Matthew Weiner, Andy Sandford

May 7, 2015

5x86 - Jean-Claude Van Damme, Nina Dobrev, The Word

May 11, 2015

5x87 - Reese Witherspoon, Adam Devine, Jerry Rocha

May 12, 2015

5x88 - Betty White, Sex Mathematician Clio Cresswell, Lord Huron

May 18, 2015

5x89 - Steven Ho, Brittany Snow, Incubus

May 19, 2015

5x90 - Patton Oswalt, Bill Kreutzmann, The Tallest Man on Earth

May 20, 2015

5x91 - Cobie Smulders, Jay Larson, Jenny Zigrino

May 21, 2015

5x92 - Joel McHale, Jake Tapper, Courtney Barnett

June 1, 2015

5x93 - Kellan Lutz, Jeff Ross, Gary Gulman

June 2, 2015

5x94 - Thomas Middleditch, Rob Riggle, Spoon

June 3, 2015

5x95 - Nick Offerman, Jen Kirkman, My Morning Jacket

June 4, 2015

5x96 - Tim Robbins, Marc Maron, The Milk Carton Kids

June 8, 2015

5x97 - Larry King, Anna Chlumsky, Yelawolf

June 9, 2015

5x98 - Bryce Dallas Howard, Tony Hale, Zella Day

June 10, 2015

5x99 - Chris Pratt, Eric Dane, Dawes

June 11, 2015

5x100 - Jeff Garlin, Angie Harmon, Tim Minchin

June 15, 2015

5x102 - Steve Ballmer, Blake Anderson, Allen Stone

June 17, 2015

5x103 - Josh Hutcherson, Chris Gethard, Drennon Davis, Karen Kilgariff

June 18, 2015

5x104 - Judd Apatow, Ashley Tisdale, Fort Minor

June 22, 2015

5x105 - Lauren Graham, Colin Quinn, Ray Wylie Hubbard

June 23, 2015

5x106 - Michael Sheen, Kiersey Clemons, Houndmouth

June 24, 2015

5x107 - Adam Scott, Jason Schwartzman, Natasha Lyonne, Mark Normand

June 25, 2015

5x108 - Evangeline Lilly, Marshawn Lynch, Colony House

June 29, 2015

5x109 - Kumail Nanjiani, Danielle Brooks, Miguel

June 30, 2015

5x110 - Maya Rudolph, Hannibal Buress, Tove Lo

July 1, 2015

5x111 - Jane Lynch, Conor McGregor, John Roy

July 2, 2015

5x112 - Conan at Comic Con - Elijah Wood, Chris Hardwick

July 8, 2015

5x113 - Conan at Comic Con - Jennifer Lawrence, Josh Hutcherson, Liam Hemsworth

July 9, 2015

5x114 - Conan at Comic Con - The Walking Dead Vs Game Of Thrones At Comic Con With Conan

July 10, 2015

5x115 - Conan at Comic Con - The Cast Of "X-Men: Apocalypse", Peter Capaldi

July 11, 2015

5x116 - Jack Black, Boy George, Death Cab for Cutie

July 13, 2015

5x117 - Emma Stone, Lindsey Vonn, JD McPherson

July 14, 2015

5x118 - 50 Cent, Anders Holm, Father John Misty

July 15, 2015

5x119 - Paul Rudd, Wyatt Cenac, James Smith

July 16, 2015

5x120 - Ice-T & Coco, Jimmy Pardo

August 3, 2015

5x121 - Ryan Reynolds, Judy Greer, Catfish And The Bottlemen

August 4, 2015

5x122 - Armie Hammer, Niecy Nash, Leon Bridges

August 5, 2015

5x123 - Christina Applegate, Tom Papa, Nat Faxon

August 6, 2015

5x124 - Matt LeBlanc, Jessica St. Clair, Hot Chip

August 10, 2015

5x125 - Ice Cube, O'Shea Jackson Jr., Adam Pally, Alabama Shakes

August 11, 2015

5x126 - Jason Segel, Ruby Rose, Jason Isbell

August 12, 2015

5x127 - Kevin Bacon, John H. Sununu, Maggie May

August 13, 2015

5x128 - Patrick Stewart, Grace Potter

August 17, 2015

5x129 - Lisa Kudrow, Uzo Aduba, Bully

August 18, 2015

5x130 - J.B. Smoove, Tig Notaro, Langhorne Slim

August 19, 2015

5x131 - Bill Hader, Bill Burr, Sam Morril

August 20, 2015

5x132 - Jeff Goldblum, Jerrod Carmichael, Marina Franklin

August 24, 2015

5x133 - Kristin Chenoweth, Jeb Corliss, Unknown Mortal Orchestra

August 25, 2015

5x134 - Jeffrey Tambor, Al Madrigal, And Musical Guest Ashley Monroe

August 26, 2015

5x135 - Scrapisode 2: A Rehearsal Highlight Show

August 27, 2015

5x136 - Jim Gaffigan, Nathalie Emmanuel, Blackberry Smoke

September 14, 2015

5x137 - Paul Bettany, David Drew Howe & Pam Howe, Nathaniel Rateliff & The Night Sweats

September 15, 2015

5x138 - David Oyelowo, Asa Butterfield, JR JR

September 16, 2015

5x139 - Emily Mortimer, Thomas Middleditch, Andrew Sleighter

September 17, 2015

5x140 - Fred Armisen, Chrissie Hynde, Circa Waves

September 21, 2015

5x141 - Sharon Osbourne, Donald Glover, Caleb Synan

September 22, 2015

5x142 - Tim Allen, Ta'Rhonda Jones, Gary Clark Jr.

September 23, 2015

5x143 - Billy Gardell, Kristen Schaal, Kurt Vile

September 24, 2015

5x144 - Terry Crews, Jenna Coleman, Ed Gamble

September 28, 2015

5x145 - Joseph Gordon-Levitt, Andrew McMahon

September 29, 2015

5x146 - Kunal Nayyar, Ed Burns, El Vy

September 30, 2015

5x147 - Benicio del Toro, Starlee Kine, Watkins Family Hour

October 1, 2015

5x148 - Kevin Nealon, Randall Park, Paul Weller

October 5, 2015

5x149 - Ellen Page, Gustavo Dudamel, Randy Liedtke

October 6, 2015

5x150 - David Mizejewski & Animals, Nasim Pedrad, Robert DeLong

October 7, 2015

5x151 - Aaron Sorkin, Artie Lange

October 8, 2015