Jeff Winger
Joel McHale
Pierce Hawthorne
Chevy Chase
Britta Perry
Gillian Jacobs
Shirley Bennett
Yvette Nicole Brown
Abed Nadir
Danny Pudi
Annie Edison
Alison Brie
Dean Craig Pelton
Jim Rash
Ben Chang
Ken Jeong
Troy Barnes
Donald Glover
Vaughn
Eric Christian Olsen
Mark's Mom
Lisa Rinna
Amber
Katharine McPhee
Star-Burns
Dino Stamatopoulos
Professor Ian Duncan / Xim-Xam / Mix-Max (voice)
John Oliver
Professor Whitman
John Michael Higgins
Mike
Anthony Michael Hall
Male Nurse Jackie
Patton Oswalt
Professor Michelle Slater
Lauren Stamile
Rich
Greg Cromer
Officer Cackowski
Craig Cackowski
Leonard
Richard Erdman
Coach Bogner
Blake Clark
Doreen
Sharon Lawrence
Jerry the Janitor
Jerry Minor
Leonard
Richard Erdman
Professor Holly
Tony Hale
Jeremy Simmons
Aaron Himelstein
Dan Harmon
Madame LeClair
Twink Caplan
Garrett Lambert
Erik Charles Nielsen
Mark Millot / Student
D.C. Pierson
Buddy
Jack Black
Admiral Slaughter
Lee Majors
Other Study Group's Leader
Owen Wilson
Gobi Nadir
Iqbal Theba
Vicki
Danielle Kaplowitz
Rabbi Chang
Tom Yi
Neil
Charley Koontz
Magnitude
Luke Youngblood
Francesca "Frankie" Dart / Debra Chambers
Paget Brewster
Elroy Patashnik / Narrator (voice)
Keith David
Professor Buzz Hickey
Jonathan Banks
Richie / Board Member #2 / Faculty #1
Brady Novak
Todd
David Neher
Pavel
Dominik Musiol
Carl / Carl - Board Member #1 / Board Member #1
Jeremy Scott Johnson
Greendale Human Being
William Love
Young Guy / Bill / Student #1
Bill Parks
Vice Dean Laybourne
John Goodman
Dean Spreck
Jordan Black
Ludwig Göransson
Petur Hliddal
Murray / AC Repairman
Dan Bakkedahl
Mary Fukuto
Dave
Darsan Solomon
Patrick Kienlen
Russ Krasnoff
A.J. Morewitz
Brandon Soo Hoo
Richard McGonagle
Jill Latiano
Eve Brent
Eva Tingley
Cafeteria Lady
Patricia Belcher
Additional
Patrick Bradford
#21 Football Player
Alan Gray