Lena Dunham; Max Greenfield; Brandy Clark

S21 E01 • Monday, Jan 6, 2014 • Jan 6

From "Girls", creator and actress Lena Dunham; from "New Girl", actor Max Greenfield; musical guest Brandy Clark.

Joel McHale; Marv Albert; Washed Out

S21 E02 • Tuesday, Jan 7, 2014 • Jan 7

From "Community", actor Joel McHale; sportscaster Marv Albert; musical guests Washed Out.

Scarlett Johansson; John Grant

S21 E03 • Wednesday, Jan 8, 2014 • Jan 8

From "Captain America: The Winter Solider", actress Scarlett Johansson; musical guest John Grant.

Anderson Cooper; Bobby Moynihan; Will Hoge

S21 E04 • Thursday, Jan 9, 2014 • Jan 9

TV host Anderson Cooper; from "Saturday Night Live", comedian Bobby Moynihan; musical guest Will Hoge.

Mindy Kaling; Jeff Altman; Red Fang

S21 E05 • Friday, Jan 10, 2014 • Jan 10

From "The Mindy Project", creator and actress Mindy Kaling; stand-up comedy by Jeff Altman; musical guests Red Fang.

Bill Cosby; Sleigh Bells

S21 E06 • Monday, Jan 13, 2014 • Jan 13

Comedy legend Bill Cosby; musical guests Sleigh Bells.

Michael Strahan; Jennifer Nettles

S21 E07 • Tuesday, Jan 14, 2014 • Jan 14

From "LIVE with Kelly and Michael", co-host Michael Strahan; musical guest Jennifer Nettles.

Kevin Hart; Mo Rocca; The Orwells

S21 E08 • Wednesday, Jan 15, 2014 • Jan 15

Actor and comedian Kevin Hart; from "My Grandmother’s Ravioli" and "CBS Sunday Morning", journalist Mo Rocca; musical guests The Orwells.

Brian Williams; Rosanne Cash

S21 E09 • Thursday, Jan 16, 2014 • Jan 16

New anchor Brian Williams; musical guest Rosanne Cash.

Don Cheadle; Myq Kaplan; Roadkill Ghost Choir

S21 E10 • Friday, Jan 17, 2014 • Jan 17

From "House of Lies", actor/producer Don Cheadle; stand-up comedy by Myq Kaplan; musical guests Roadkill Ghost Choir.

Andy Samberg; Michael B. Jordan; Ellie Goulding

S21 E11 • Tuesday, Jan 21, 2014 • Jan 21

From "Brooklyn Nine-Nine", actor and comedian Andy Samberg; from "That Awkward Moment", actor Michael B. Jordan; musical guest Ellie Goulding.

Martin Scorsese; Allison Williams; Cults

S21 E12 • Wednesday, Jan 22, 2014 • Jan 22

From "The Wolf of Wall Street", director Martin Scorsese; from "Girls", actress Allison Williams; musical guests Cults.

Rachel Maddow; Spike Jonze; No Age

S21 E13 • Thursday, Jan 23, 2014 • Jan 23

TV host and journalist Rachel Maddow; from "Her", director and writer Spike Jonze; musical guests No Age.

Kevin Bacon; Pat McGann; Devon Avenue

S21 E14 • Friday, Jan 24, 2014 • Jan 24

From "The Following", actor Kevin Bacon; stand-up comedy by Pat McGann; musical guests Devon Avenue.

Louis C.K.; B.J. Ganem; Artic Monkeys

S21 E15 • Monday, Jan 27, 2014 • Jan 27

From "Louie", creator and comic Louis C.K.; Marine veteran B.J. Ganem; musical guests Artic Monkeys.

Eric Stonestreet; Nick Goepper; Bastille

S21 E16 • Tuesday, Jan 28, 2014 • Jan 28

From "Modern Family", actor Eric Stonestreet; freeskier Nick Goepper; musical guests Bastille.

Drew Brees; B.J. Novak; Against Me!

S21 E17 • Wednesday, Jan 29, 2014 • Jan 29

New Orleans Saints quarterback, Drew Brees; actor/author/comedian B.J. Novak; a Top Ten List presented by David Stern; musical guests Against Me!.

Dr. Phil McGraw; Danny Koker; Dum Dum Girls

S21 E18 • Thursday, Jan 30, 2014 • Jan 30

TV host Dr. Phil McGraw; from "Counting Cars", TV personality Danny Koker; musical guests Dum Dum Girls.

Bill Murray; Eagulls

S21 E19 • Friday, Jan 31, 2014 • Jan 31

From "The Monuments Men", actor/comic Bill Murray; musical guests Eagulls.

Will Arnett; Broken Bells

S21 E20 • Monday, Feb 3, 2014 • Feb 3

George Clooney; Sting

S21 E21 • Tuesday, Feb 4, 2014 • Feb 4

Matt Damon; Lenny Kravitz

S21 E22 • Wednesday, Feb 5, 2014 • Feb 5

Patrick Stewart; The Flaming Lips

S21 E23 • Thursday, Feb 6, 2014 • Feb 6

Regis Philbin; Ms. Lauryn Hill

S21 E24 • Friday, Feb 7, 2014 • Feb 7

Kevin Spacey, Amber Heard, a Top Ten List presented by the cast of

S21 E25 • Monday, Feb 17, 2014 • Feb 17

Sage Kotsenburg, Kate Mara

S21 E26 • Tuesday, Feb 18, 2014 • Feb 18

Cole Swindell?

Kaitlyn Farrington, Lupita Nyong'o, Little Dragon

S21 E27 • Wednesday, Feb 19, 2014 • Feb 19

Keri Russell, Terry Fator

S21 E28 • Thursday, Feb 20, 2014 • Feb 20

Pauley Perrette, Jeff Caldwell, Lake Street Dive

S21 E29 • Friday, Feb 21, 2014 • Feb 21

Kaley Cuoco-Sweeting, Dale Earnhardt, Jr., The Fray

S21 E30 • Monday, Feb 24, 2014 • Feb 24

Olympic Gold Medalist Ted Ligety, Kat Dennings, Lo-Fang

S21 E31 • Tuesday, Feb 25, 2014 • Feb 25

Meredith Vieira, Band of Horses

S21 E32 • Wednesday, Feb 26, 2014 • Feb 26

Stupid Human Tricks, Simon Helberg, Young the Giant

S21 E33 • Thursday, Feb 27, 2014 • Feb 27

Jack (Jungle) Hanna, Jake Johannsen

S21 E34 • Friday, Feb 28, 2014 • Feb 28

Zach Braff, Sgt. Brendan Marrocco & Dr. Andrew Lee, Future Islands

S21 E35 • Monday, Mar 3, 2014 • Mar 3

Michael Keaton, Phantogram

S21 E36 • Tuesday, Mar 4, 2014 • Mar 4

Tom Selleck, Carrie Brownstein, David Nail

S21 E37 • Wednesday, Mar 5, 2014 • Mar 5

Tom Brokaw, Andrew Hadlock, Bob Mould

S21 E38 • Thursday, Mar 6, 2014 • Mar 6

Mary-Louise Parker, Lenny Marcus, Joan Jett & the Blackhearts

S21 E39 • Friday, Mar 7, 2014 • Mar 7

Sen. John McCain, Little Mix

S21 E40 • Monday, Mar 10, 2014 • Mar 10

Jason Bateman, Miles Teller, Gary Allan

S21 E41 • Tuesday, Mar 11, 2014 • Mar 11

Sylvester Stallone, Theo James, Ledisi

S21 E42 • Wednesday, Mar 12, 2014 • Mar 12

Bryan Cranston, Melissa Rauch, Le1f

S21 E43 • Thursday, Mar 13, 2014 • Mar 13

Bill O'Reilly, Nick Griffin, the Dough Rollers

S21 E44 • Friday, Mar 14, 2014 • Mar 14

Jimmy Carter

S21 E45 • Monday, Mar 24, 2014 • Mar 24

Emma Watson, Nick Offerman, a musical tribute to Johnny Cash

S21 E46 • Tuesday, Mar 25, 2014 • Mar 25

Peter Dinklage, Hari Kondabolu, Sage the Gemini

S21 E47 • Wednesday, Mar 26, 2014 • Mar 26

Cobie Smulders, Nick Cannon, Manchester Orchestra

S21 E48 • Monday, Mar 31, 2014 • Mar 31

Kristin Chenoweth, Amy Schumer, Johnnyswim

S21 E49 • Tuesday, Apr 1, 2014 • Apr 1

Bill Murray, Martha Stewart, Lady Gaga

S21 E50 • Wednesday, Apr 2, 2014 • Apr 2