- Robin Williams
- Â Mork / ... 94 episodes, 1978-1982
- Pam Dawber
- Â Mindy McConnell / ... 94 episodes, 1978-1982
- Ralph James
- Â Orson 82 episodes, 1978-1982
- Conrad Janis
- Â Fred McConnell 70 episodes, 1978-1982
- Tom Poston
- Â Mr. Bickley 54 episodes, 1979-1981
- Jay Thomas
- Â Remo DaVinci 46 episodes, 1979-1981
- Gina Hecht
- Â Jean DaVinci 46 episodes, 1979-1981
- Jim Staahl
- Â Nelson Flavor 45 episodes, 1979-1981
- Elizabeth Kerr
- Â Cora Hudson 33 episodes, 1978-1982
- Robert Donner
- Â Exidor / ... 24 episodes, 1978-1982
- Crissy Wilzak Comstock
- Â Glenda Faye Comstock 23 episodes, 1980-1981
- Bebo
- Â Self 21 episodes, 1980-1981
- Jonathan Winters
- Â Mearth / ... 20 episodes, 1981-1982
- Jeffrey Jacquet
- Â Eugene 10 episodes, 1978-1979
- Amy Tenowich
- Â Lola / ... 9 episodes, 1980-1981
- Stephanie Kayano
- Â Stephanie 8 episodes, 1980-1981
- Patrick Cranshaw
- Â Jake Loomis / ... 6 episodes, 1978-1982
- Bill Kirchenbauer
- Â Todd Norman Taylor / ... 4 episodes, 1979-1982
- Jonathan Ian
- Â Jonathan 4 episodes, 1980-1981
- Joe Regalbuto
- Â Kalnik 3 episodes, 1982
- George Pentecost
- Â Herman / ... 3 episodes, 1979-1982
- Morgan Fairchild
- Â Susan Taylor 3 episodes, 1978-1979
- Shelley Fabares
- Â Cathy McConnell 3 episodes, 1980-1981
- Dick Yarmy
- Â Dr. Litney / ... 3 episodes, 1978-1980
- Tom Kindle
- Â Bozz / ... 3 episodes, 1978-1980
- Foster Brooks
- Â Miles Sternhagen 3 episodes, 1981
- Vidal Peterson
- Â The Elder 3 episodes, 1980-1981
- Ronnie Schell
- Â Bob Faith 2 episodes, 1979
- Maureen Arthur
- Â Zelka 2 episodes, 1981-1982
- Susan Lawrence
- Â Sally Friedman 2 episodes, 1978-1979
- Jeremy Vernon
- Â Jerry Looney 2 episodes, 1979
- Linda Henning
- Â Margaret / ... 2 episodes, 1979
- Harvey Lembeck
- Â Ovits 2 episodes, 1981-1982
- Raquel Welch
- Â Captain Nirvana 2 episodes, 1979
- Johnny Haymer
- Â Danny St. Tommy 2 episodes, 1979
- Beans Morocco
- Â Dittman / ... 2 episodes, 1978-1982
- James Staley
- Â Stu Scully / ... 2 episodes, 1979-1981
- Georgia Engel
- Â Ambrosia Malspar 2 episodes, 1979
- Vicki Frederick
- Â Sutra 2 episodes, 1979
- Ilene Graff
- Â Receptionist / ... 2 episodes, 1981-1982
- Jeff Harlan
- Â Bill / ... 2 episodes, 1978-1979
- William Porter
- Â Ernest / ... 2 episodes, 1979-1981
- Ed Greenberg
- Â Jack / ... 2 episodes, 1979-1981
- Anita Dangler
- Â Princess Lusitania / ... 2 episodes, 1979
- David Wall
- Â Club Owner / ... 2 episodes, 1979
- Bill Morey
- Â Carl Simpson / ... 2 episodes, 1979-1980
- Debra Jo Fondren
- Â Kama 2 episodes, 1979
- Priscilla Morrill
- Â Miss Kalinowski / ... 2 episodes, 1980
- Paul Willson
- Â Neighbor Bob Miller / ... 2 episodes, 1980-1982
- Corey Feldman
- Â Billy 2 episodes, 1980
- Julia Hendler
- Â Julia 2 episodes, 1980
- John Miranda
- Â Cop / ... 2 episodes, 1979-1981
- Elliot Jaffe
- Â Elliot 2 episodes, 1980
- Scott Marshall
- Â Boy Scout / ... 2 episodes, 1980-1981
- Barry Van Dyke
- Â Dan Phillips 1 episode, 1978
- Brion James
- Â George 1 episode, 1978
- Tim Thomerson
- Â Sergei Khruschev 1 episode, 1979
- Don Galloway
- Â FBI Man 1 episode, 1979
- Sam Freed
- Â Cliff 1 episode, 1979
- Paul Reubens
- Â Dickie Nimitz 1 episode, 1981
- John Larroquette
- Â Baba Hope 1 episode, 1981
- Louanne
- Â Miss Geezba 1 episode, 1981
- Hugh Gillin
- Â Dave 1 episode, 1981
- Lou Carry
- Â The Clerk 1 episode, 1981
- Barbara Billingsley
- Â Mrs. Louise Bailey 1 episode, 1982
- John Houseman
- Â Milt 1 episode, 1982
- Ray Girardin
- Â Phil 1 episode, 1982
- Charles Bloom
- Â Daniel Pierson 1 episode, 1982
- Tracy Austin
- Â Tracy Austin 1 episode, 1982
- Geoffrey Lewis
- Â Deputy Tilwick 1 episode, 1978
- Logan Ramsey
- Â Arnold Wanker 1 episode, 1978
- Jeff Altman
- Â Clint Mullet 1 episode, 1978
- Kit McDonough
- Â Marcia 1 episode, 1978
- Ed Bernard
- Â Officer Boyd 1 episode, 1978
- J.D. Hinton
- Â Brad 1 episode, 1978
- Ruta Lee
- Â Lisa 1 episode, 1979
- Tammy Lauren
- Â Holly 1 episode, 1979
- Henry Polic II
- Â Dr. Benton Phillips 1 episode, 1979
- Sandie Newton
- Â Jennifer 1 episode, 1979
- Ned Wertimer
- Â The Clerk 1 episode, 1979
- Richard Moll
- Â Baba Gentle 1 episode, 1981
- Stanley Kamel
- Â Charlie 1 episode, 1981
- Robin Strand
- Â Steve Sanders 1 episode, 1981
- Donald Welch
- Â Peevee Clone #1 / ... 1 episode, 1981
- William Shatner
- Â William Shatner 1 episode, 1982
- Don Dubbins
- Â Secretary General 1 episode, 1982
- Phillip R. Allen
- Â George Logan 1 episode, 1982
- Max Maven
- Â S. Devlin 1 episode, 1982
- Mark Fenske
- Â Tom 1 episode, 1982
- Maria Lanahan
- Â Fatima 1 episode, 1982
- Fay DeWitt
- Â Annie Wanker 1 episode, 1978
- Bruce M. Fischer
- Â The Big Man 1 episode, 1978
- David Ketchum
- Â The Salesman 1 episode, 1978
- Dinah Manoff
- Â Kathy Cumberland 1 episode, 1979
- Roddy McDowall
- Â Chuck the Robot 1 episode, 1979
- Robert Hogan
- Â Captain Chapman 1 episode, 1979
- David Letterman
- Â Ellsworth 1 episode, 1979
- Barbara Cason
- Â Nurse #2 1 episode, 1979
- Peter Elbling
- Â The French Waiter 1 episode, 1979
- Robin Eisenman
- Â Penny 1 episode, 1979
- Jerrold Ziman
- Â Shop Owner 1 episode, 1979
- Susan Elliot
- Â Rainbow 1 episode, 1979
- Franceen Cornfield
- Â Cherry 1 episode, 1979
- Jack Dodson
- Â Ricky 1 episode, 1980
- Tom Sullivan
- Â Tom Bickley 1 episode, 1980
- Ed Peck
- Â Jim Blake 1 episode, 1980
- Peggy Pope
- Â Mrs. Thompson 1 episode, 1980
- Samantha Harper
- Â Mrs. L.W. 1 episode, 1980
- Garry Goodrow
- Â Father Denny 1 episode, 1980
- Beverly Dixon
- Â Woman #1 1 episode, 1980
- Lee Weaver
- Â Gus 1 episode, 1981
- Marilyn Kagan
- Â Althea 1 episode, 1981
- Jennifer Wallace
- Â Sissy 1 episode, 1981
- Martin Ferrero
- Â The Salesman 1 episode, 1982
- Stephen Stucker
- Â Billy Vincent 1 episode, 1982
- Jillian Kesner
- Â Judi Marino 1 episode, 1982
- Milton James
- Â The Waiter 1 episode, 1982
- Kathleen McIntyre
- Â Miss Beasley 1 episode, 1982
- Judy Pioli
- Â The Matron 1 episode, 1982
- Kristin Larkin
- Â Suzanne 1 episode, 1982
- Dana Hill
- Â The Girl Scout 1 episode, 1978
- Michael Prince
- Â The Judge 1 episode, 1978
- Jeremy West
- Â The Funeral Home Attendant 1 episode, 1978
- Ysabel MacCloskey
- Â The Woman 1 episode, 1978
- Carl Gottlieb
- Â Justice Abbott 1 episode, 1979
- David Haskell
- Â Lieutenant Chambers 1 episode, 1979
- Timothy Blake
- Â Madge 1 episode, 1979
- Ken Magee
- Â Man #1 1 episode, 1979
- Bob Arbogast
- Â The Policeman 1 episode, 1979
- Michael Danahy
- Â The Customer 1 episode, 1979
- Linda Ewen
- Â The Waitress 1 episode, 1979
- Charles Lane
- Â Judge Baker 1 episode, 1980
- Jeff Cotler
- Â Jeff 1 episode, 1980
- Terence McGovern
- Â Club Manager 1 episode, 1980
- Nancy Steen
- Â Helen Anderson 1 episode, 1980
- Mary Betten
- Â Woman in Church 1 episode, 1980
- Blanche Bronte
- Â Rosa DaVinci 1 episode, 1980
- Sheryl Bolt
- Â Gooball Saleswoman 1 episode, 1980
- Stephanie Dizon
- Â Stephanie 1 episode, 1981
- Randy Brooks
- Â Stan Jackson 1 episode, 1982
- Larry Carroll
- Â Larry Carroll 1 episode, 1982
- Nancy Eddo
- Â Stella Benson 1 episode, 1982
- Wally Dalton
- Â The Guard 1 episode, 1978
- Stu Silver
- Â The Paramedic #1 1 episode, 1978
- Melanie Vincz
- Â Kathy 1 episode, 1979
- Lu Leonard
- Â Lady #1 1 episode, 1979
- Lloyd Kino
- Â Mr. Wang 1 episode, 1979
- Michelle Downey
- Â Susie 1 episode, 1979
- Ty Henderson
- Â Airman Endo 1 episode, 1979
- Anna Upstrom
- Â Suzy 1 episode, 1979
- Noah Hathaway
- Â Jud 1 episode, 1980
- Angela Aames
- Â Girl #1 1 episode, 1980
- Melissa Francis
- Â Little Mindy 1 episode, 1980
- David Spielberg
- Â Peter Pan 1 episode, 1980
- Alice Borden
- Â Floor Wax Saleswoman 1 episode, 1980
- Wendy Cutler
- Â Future Bride 1 episode, 1980
- Pamela Sye
- Â Pamela 1 episode, 1980
- Ross Martin
- Â Godfrey 1 episode, 1981
- Lyle Waggoner
- Â Xerko 1 episode, 1981
- Richard Libertini
- Â Mr. Strand 1 episode, 1981
- Larry Gelman
- Â Mr. Al Klevins 1 episode, 1981
- Brian Seff
- Â Rick 1 episode, 1981
- Jim Greenleaf
- Â Donald 1 episode, 1982
- John E. Bristol
- Â Ebu 1 episode, 1982
- Cary Zateslo
- Â Tommy Nesbitt 1 episode, 1982
- Woody Eney
- Â Prosecuting Attorney 1 episode, 1978
- Kim Fields
- Â Pattie 1 episode, 1979
- Gregory Itzin
- Â Man #2 1 episode, 1979
- Alan McRae
- Â Airman McFarland 1 episode, 1979
- Lorrie Mahaffey
- Â Ann 1 episode, 1979
- Brad Savage
- Â Boy in Church 1 episode, 1980
- Joe Howard
- Â Veterinarian 1 episode, 1980
- Virginia Capers
- Â Nurse Tula 1 episode, 1980
- Terrence E. McNally
- Â Laxative Salesman 1 episode, 1980
- Lisa Katz
- Â Girl #2 1 episode, 1980
- Rance Howard
- Â Guard 1 episode, 1981
- Elinor Donahue
- Â Dr. Joni Lincoln 1 episode, 1981
- Beverly Sanders
- Â Caroline McConnell 1 episode, 1981
- Brian Cutler
- Â Policeman #2 1 episode, 1981
- Laura Carlson
- Â The Messenger 1 episode, 1981
- Monica Ganas
- Â Ruby 1 episode, 1981
- Catherine Campbell
- Â Pepper 1 episode, 1981
- Chea Collette
- Â Belk 1 episode, 1982
- Hank Jones
- Â Defense Attorney 1 episode, 1978
- Joyce Mandel
- Â Peggy Black 1 episode, 1979
- Elizabeth Hoy
- Â Girl 1 episode, 1979
- Shirley Jo Finney
- Â Nurse #1 1 episode, 1979
- William Bumiller
- Â Derrick 1 episode, 1980
- James Jarnigan
- Â Boy #1 1 episode, 1980
- Grant Johnson
- Â Grant Johnson 1 episode, 1980
- Gavin Muir
- Â Boy 1 episode, 1980
- Angus Duncan
- Â Bob Turnbow 1 episode, 1981
- Wendy Hoffman
- Â Sheri 1 episode, 1981
- Charles Thomas Murphy
- Â Mugger #1 1 episode, 1981
- Hillary Horan
- Â Young Girl 1 episode, 1981
- Jessica Hoyt
- Â Mandy McDonald 1 episode, 1981
- Joshua Raoul Brody
- Â Raoul 1 episode, 1981
- Keith Coogan
- Â Scotti 1 episode, 1982
- Leslie Vallen
- Â Court Reporter 1 episode, 1978
- Wayne Morton
- Â Doctor 1 episode, 1979
- Reid Smith
- Â Wheels Simpson 1 episode, 1980
- Cheryl McRaven
- Â Cheryl McRaven 1 episode, 1980
- Anthony Peck
- Â Mugger #2 1 episode, 1981
- Sandy Sprung
- Â Woman 1 episode, 1981
- Raymond Fitzpatrick
- Â Ticket Agent 1 episode, 1981
- Johnnie Decker
- Â Man 1 episode, 1981
- Henry Winkler
- Â The Fonz 1 episode, 1978
- Vernon Weddle
- Â Mr. Burnett 1 episode, 1979
- Denver Bronco Pony Express Cheerleaders
- Â Denver Broncos Pony Express Cheerleaders 1 episode, 1979
- Roger Simpson-Harris
- Â Club Owner 1 episode, 1979
- Jim Gatherum
- Â Boy #2 1 episode, 1980
- Hudson Potson
- Â Hudson Poston 1 episode, 1980
- Ron Recasner
- Â Policeman #1 1 episode, 1981
- Penny Marshall
- Â Laverne Defazio 1 episode, 1978
- Linda Ebert
- Â Cheerleader 1 episode, 1979
- Jason Poston
- Â Jason Poston 1 episode, 1980
- Lynda Hatfield
- Â Cheerleader 1 episode, 1979
- Anthony Storm
- Â Anthony Storm 1 episode, 1980
- Jody Jones
- Â Cheerleader 1 episode, 1979
- Casey Storm
- Â Casey Storm 1 episode, 1980
- Darcy Kleman
- Â Cheerleader 1 episode, 1979
- Karla Pasta
- Â Cheerleader 1 episode, 1979
- Linda Tenowich
- Â Linda Tenowich 1 episode, 1980
- Kim Smith
- Â Cheerleader 1 episode, 1979
- Maggie Roswell
- Â Donna Hammond 1 episode, 1981
- Larry Anderson
- Â Mario Hammond 1 episode, 1981
- Tyler Horn
- Â Soldier (uncredited) 2 episodes, 1979
- Laura Reed
- Â Young Mindy (uncredited) 1 episode, 1978
- Robby the Robot
- Â Chuck the Robot (uncredited) 1 episode, 1979
- Stan Rodarte
- Â Waiter (uncredited) 1 episode, 1979
- Jon Schroeder
- Â Grandpa #2 (uncredited) 1 episode, 1979
- Michael W. Schwartz
- Â Deli Customer (uncredited) 1 episode, 1979
- John Turi
- Â Kid in music store (uncredited) 1 episode, 1979
- David Sherrill
- Â Skateboard Kid (uncredited) 1 episode, 1980
- Lori Randolph
- Â Blonde Little Girl Mindy Jeep (uncredited) 1 episode, 1980
- Felix Silla
- Â Orkan Porter (uncredited) 1 episode, 1981