Alice Eve, Mark Duplass, Wyatt Cenac, Dorothy

Season 4 - Episode 1

Rob Corddry, Paula Abdul

Season 4 - Episode 2

Blake Griffin, Paul Feig, Demetri Martin

Season 4 - Episode 3

Cher, William H. Macy

Season 4 - Episode 4

Rob Lowe, Leighton Meester, Poppy

Season 4 - Episode 5

Joe Manganiello, Jennifer Love Hewitt, Why Don't We

Season 4 - Episode 6

Allison Brie, Keegan-Michael Key, Prof. Robert Winston

Season 4 - Episode 7

Mel B, Dr. Phil McGraw, Olivia Munn, Good Charlotte

Season 4 - Episode 8

Tracey Ullman, Henry Golding, Madison Beer

Season 4 - Episode 9

Kaley Cuoco, Joel McHale, Gaz Coombes

Season 4 - Episode 10

Joan Collins, Johnny Galecki, Badflower

Season 4 - Episode 11

Tiffany Haddish, Jay Hernandez, Tori Kelly

Season 4 - Episode 12

Rupert Everett, Rob Riggle, Ben Howard

Season 4 - Episode 13

Max Greenfield, Sophie Turner, Josh Groban

Season 4 - Episode 14

Damon Wayans Jr., Gina Rodriguez, Mark Normand

Season 4 - Episode 15

Chris Sullivan, Lil Rel Howery, Sabrina Carpenter

Season 4 - Episode 16

Riz Ahmed, Mary Elizabeth Winstead, Phosphorescent

Season 4 - Episode 17

Actor Riz Ahmed (Venom (2018)); actress Mary Elizabeth Winstead (All About Nina (2018)); Phosphorescent perform.

Jeff Bridges, Jenny Slate, Arctic Monkeys

Season 4 - Episode 18

Beth Behrs, Taran Killam, Boy George

Season 4 - Episode 19

Jon Hamm, Judy Greer

Season 4 - Episode 20

Keira Knightley, Kathryn Hahn, Joe Zimmerman

Season 4 - Episode 21

Jamie Lee Curtis, Felix Mallard, Colin Macleod

Season 4 - Episode 22

Maya Rudolph, Nick Kroll, Rufus Wainwright

Season 4 - Episode 23

Dakota Johnson, Gordon Ramsay, Mike Posner

Season 4 - Episode 24

Jamie Dornan, Florence Welch, Florence + The Machine

Season 4 - Episode 25

Rosamund Pike, Zlatan Ibrahimovic, Snow Patrol

Season 4 - Episode 26

Amber Stevens West, Randall Park, Lenny Kravitz

Season 4 - Episode 27

Carey Mulligan, Jenna Fischer

Season 4 - Episode 28

Greg Kinnear, Katie Hill, Ariana Grande

Season 4 - Episode 29

Actor Greg Kinnear ("House of Cards"); congressional candidate Katie Hill; singer/songwriter Ariana Grande;

Adam DeVine, Dan Stevens, KISS

Season 4 - Episode 30

Rami Malek, Joel Edgerton, Mike Shinoda, Barbra Streisand

Season 4 - Episode 31

Aaron Taylor-Johnson, Richard Madden, KISS, Snow Patrol

Season 4 - Episode 32

Busy Philipps, Noah Centineo, Derren Brown, Morrissey

Season 4 - Episode 33

Zoe Kazan, Jack Whitehall, Chloe x Halle

Season 4 - Episode 34

Octavia Spencer, Jesse Williams, Pentatonix

Season 4 - Episode 35

Justin Hartley, Dominic West, Elle King, Migos

Season 4 - Episode 36

Melissa McCarthy, Richard E. Grant, Mark Wahlberg, Ian Karmel

Season 4 - Episode 37

Maggie Gyllenhaal, Paul Dano, Diego Luna, Dylan Reynolds

Season 4 - Episode 38

Kurt Russell, Viggo Mortensen, Marc E. Bassy ft. G-Eazy

Season 4 - Episode 39

Eric Bana, Billie Lourd, Emily Heller

Season 4 - Episode 40

Michael B. Jordan, Linda Cardellini, Eddie Redmayne, Death Cab for Cutie

Season 4 - Episode 41

Michael Peña, Andy Serkis, Lauv & Julia Michaels

Season 4 - Episode 42

Kermit the Frog, Minka Kelly, Peter Krause, Sampha

Season 4 - Episode 43

Sara Gilbert, Jeff Goldblum

Season 4 - Episode 44

Zachary Levi, Jake Johnson

Season 4 - Episode 45

Jude Law, Steve Coogan, Sam Morril

Season 4 - Episode 46

Jennifer Aniston, Dolly Parton, Leon Bridges

Season 4 - Episode 47

Sean Hayes, Ice Cube

Season 4 - Episode 48

Ellen DeGeneres, Patrick Wilson

Season 4 - Episode 49

Gisele Bündchen, Janelle Monáe, Katherine Ryan

Season 4 - Episode 50

Julia Roberts, Jason Momoa, Yahya Abdul-Mateen II, She & Him

Season 4 - Episode 51

Armie Hammer, Amber Heard, Middle Kids, Cardi B

Season 4 - Episode 52

Pharrell Williams, Gwen Stefani, Lin-Manuel Miranda, Emily Blunt

Season 4 - Episode 53

Jennifer Lopez, Leah Remini, Black Eyed Peas

Season 4 - Episode 54

Will Ferrell, RuPaul Charles

Season 4 - Episode 55

KiKi Layne, John David Washington, Alec Benjamin

Season 4 - Episode 56

Ken Jeong, Brian Tyree Henry, H.E.R.

Season 4 - Episode 57

Amy Adams, Tyler Perry, Mekki Leeper

Season 4 - Episode 58

James welcomes actress Amy Adams, actor Tyler Perry, and comic Mekki Leeper.

Cedric the Entertainer, Ashley Graham, Flatbush Zombies

Season 4 - Episode 59

Claire Foy, Andie MacDowell, Freya Ridings

Season 4 - Episode 60

Nina Dobrev, Terry Crews, Jack & Jack

Season 4 - Episode 61

Cobie Smulders, Sebastian Stan, Joel Kim Booster

Season 4 - Episode 62

Vanessa Hudgens, Andrew Rannells

Season 4 - Episode 63

Russell Wilson, Chris Pratt, Elizabeth Banks, Will Arnett

Season 4 - Episode 64

Stephen Curry, Regina King, Ron Funches, Lauren Jauregui

Season 4 - Episode 65

Sonequa Martin-Green, Pete Holmes, Rebecca Ferguson, Ava Max

Season 4 - Episode 66

Neil Patrick Harris, Chelsea Peretti, Adam Newman

Season 4 - Episode 67

Eric McCormack, Danielle Macdonald, Paige Weldon

Season 4 - Episode 68

Regina Hall, Eugene Levy, Charlie Day

Season 4 - Episode 69

Kevin Hart, Stephen James, Phosphorescent

Season 4 - Episode 70

Laura Dern, Alfonso Cuarón, Beck

Season 4 - Episode 71

Billy Crystal, Sarah Chalke, Buddy

Season 4 - Episode 72

Alicia Keys, Hailey Bieber, Joe List

Season 4 - Episode 73

Matt LeBlanc, Will Arnett, Broods

Season 4 - Episode 74

Kelsey Grammer, Jay Baruchel, Alessia Cara

Season 4 - Episode 75

Rebel Wilson, Priyanka Chopra Jonas, Justin Flom

Season 4 - Episode 76

Courteney Cox, Nick Kroll, Betty Who

Season 4 - Episode 77

Ray Romano, D'Arcy Carden, Lukas Graham

Season 4 - Episode 78

Mahershala Ali, Aaron Sorkin, Julia Michaels & Niall Horan

Season 4 - Episode 79

Elizabeth Warren, 50 Cent, TNT Boys

Season 4 - Episode 80

Kate Walsh, Stephen Merchant, Natalie Prass

Season 4 - Episode 81

Kal Penn, Chris O'Dowd, Adam Ferrara

Season 4 - Episode 82

Nick Jonas, Joe Jonas, Kevin Jonas, Lior Suchard

Season 4 - Episode 83

Isla Fisher, Chiwetel Ejiofor, Jonas Brothers

Season 4 - Episode 84

Allison Janney, Samuel L. Jackson, Jonas Brothers

Season 4 - Episode 85

Cole Sprouse, Dan Levy, Jonas Brothers

Season 4 - Episode 86

Rita Wilson, Kevin Nealon, Jason Mitchell

Season 4 - Episode 87

Gordon Ramsay, Piper Perabo, Elle King

Season 4 - Episode 88

Sharon Osbourne, Sam Richardson, Ryan Conner

Season 4 - Episode 89

Kate Beckinsale, Milo Ventimiglia, Better Oblivion Community Center

Season 4 - Episode 90

Adam Scott, Taron Egerton, Miles Kane

Season 4 - Episode 91

Ben Schwartz, Tim Roth, Leon Bridges

Season 4 - Episode 92

David Boreanaz, Cam Newton, Daddy Yankee

Season 4 - Episode 93

Max Greenfield, Maggie Siff

Season 4 - Episode 94

Kobe Bryant, Cara Delevingne, Tom Walker

Season 4 - Episode 95

Pamela Adlon, David Harbour, Wallows

Season 4 - Episode 96

Pamela Adlon; and David Harbour. Also: Wallows perform.

Rachel Bloom, Christopher Meloni, Rita Wilson

Season 4 - Episode 97

Zach Braff, Ben Platt

Season 4 - Episode 98

Zach Braff. Also: Ben Platt performs.

Colin Farrell, Woody Harrelson

Season 4 - Episode 99

Matthew McConaughey, Reba McEntire, Jimmy Buffett

Season 4 - Episode 100

Bill Hader, Anna Chlumsky, Ally Brooke, Tyga

Season 4 - Episode 101

Zoe Saldana, Jason Clarke, Kenny DeForest

Season 4 - Episode 102

Nikolaj Coster-Waldau, Sara Bareilles

Season 4 - Episode 103

Karlie Kloss, Max Minghella, Sean Paul + J Balvin

Season 4 - Episode 104

Rob Lowe, Elle Fanning, Blood Orange

Season 4 - Episode 105

Seth MacFarlane, Linda Cardellini, The 1975

Season 4 - Episode 106

Andrew Garfield, Lake Bell, BLACKPINK

Season 4 - Episode 107

Dax Shepard, Jodie Comer, Paul Rudd, Avril Lavigne

Season 4 - Episode 108

Topher Grace, Jason Schwartzman, Chad Daniels

Season 4 - Episode 109

Dr. Phil, Timothy Simons, Ashley Tisdale

Season 4 - Episode 110

Anna Faris, Kunal Nayyar, Shaggy

Season 4 - Episode 111

Charlize Theron, Seth Rogen, Lauren Jauregui

Season 4 - Episode 112

Chelsea Handler, Ginnifer Goodwin, Tom Odell

Season 4 - Episode 113

Christina Applegate, Kenneth Branagh, Rival Sons

Season 4 - Episode 114

Anne Hathaway, Rebel Wilson, Andy Sandford

Season 4 - Episode 115

Lisa Kudrow, Will Forte, Jason Sudeikis, Sarah Tollemache

Season 4 - Episode 116

Lily Collins, Charles Melton, NCT 127

Season 4 - Episode 117

Octavia Spencer, Henry Winkler

Season 4 - Episode 118

Halle Berry, Anjelica Huston, Allison Williams, Carly Rae Jepsen

Season 4 - Episode 119

Renée Zellweger, Ben Kingsley, Oliver Tree

Season 4 - Episode 120

Jessica Alba, Gabrielle Union, Josh Gondelman

Season 4 - Episode 121

Jessica Alba; and Gabrielle Union. Also: stand-up comedy from Josh Gondelman.

Elizabeth Banks, Bradley Whitford, David Tennant, Billy Ray Cyrus

Season 4 - Episode 122

Lucy Liu, James Marsden

Season 4 - Episode 123

Mark Hamill, Bradley Whitford, Lewis Capaldi

Season 4 - Episode 124

Mindy Kaling, Adam Scott, Lewis Capaldi

Season 4 - Episode 125

Tiffany Haddish, Don Cheadle, Keane

Season 4 - Episode 126

Tom Hanks, Gillian Anderson, David Blaine, Michelle Obama

Season 4 - Episode 127

Lily James, Millie Bobby Brown, Little Mix

Season 4 - Episode 128

Ian McKellen, Louis Tomlinson, Simon Pegg

Season 4 - Episode 129

Michael Sheen, Paul Giamatti, Mumford & Sons, Cast of X-Men Dark Phoenix

Season 4 - Episode 130

Paul Scheer, Stana Katic, The 1975

Season 4 - Episode 131

Eva Longoria, Thomas Lennon

Season 4 - Episode 132

Sutton Foster, Eddie Izzard, Dave Ross

Season 4 - Episode 133

Keegan-Michael Key, Terry Crews, Joshua Jay

Season 4 - Episode 134

Jeff Goldblum, Andie MacDowell, Bishop Briggs

Season 4 - Episode 135

John Legend, Mandy Moore, Hollywood Vampires

Season 4 - Episode 136

Patricia Arquette, Michael Peña, Freya Ridings

Season 4 - Episode 137

Jamie Bell, Margaret Qualley, Freya Ridings

Season 4 - Episode 138

Domhnall Gleeson, Pete Holmes, Aldis Hodge, Machine Gun Kelly, Yungblud

Season 4 - Episode 139

Melissa McCarthy, Elisabeth Moss, Jakob Dylan, Jade Castrinos

Season 4 - Episode 140

Joel McHale, Betty Gilpin

Season 4 - Episode 141

Ron Burgundy, Josh Gad, Michaela Watkins

Season 4 - Episode 142

Greg Kinnear, Judy Greer, Bazzi

Season 4 - Episode 143

RuPaul Charles, David Oyelowo, Alfie Allen

Season 4 - Episode 144

Anthony Anderson, Jared Harris, Smokey Robinson, Christian Finnegan

Season 4 - Episode 145

Michael Douglas, Nicole Byer

Season 4 - Episode 146