Richard Mulligan
Dr. Harry Weston (170 eps)
Dinah Manoff
Carol Weston (170 eps)
David Leisure
Charley Dietz (170 eps)
Park Overall
LaVerne Todd (170 eps)
Kristy McNichol
Barbara Weston (121 eps)
Estelle Getty
Sophia Petrillo (52 eps)
Marsha Warfield
Dr. Maxine Douglas (50 eps)
Paul Provenza
Patrick Arcola (26 eps)
Lisa Rieffel
Emily Weston (26 eps)
Betty White
Rose Nylund (3 eps)
Edan Gross
Jeffrey Millstein (3 eps)
Judith Marie-Bergan
Janet (2 eps)
Elmarie Wendel
Vivian (2 eps)
Eva Charney
Michelle (2 eps)
Raye Birk
Albert (2 eps)
Mayim Bialik
Laurie Kincaid (1 eps)
Angie Dickinson
Jackie Sheridan (1 eps)
Adrian Zmed
Gary (1 eps)
Rue McClanahan
Blanche Devereaux (1 eps)
Nancy Cartwright
Ann (1 eps)
Katherine Cannon
Dr. Kenney (1 eps)
Bea Arthur
Dorothy Zbornak (1 eps)
Marla Adams
Elna (1 eps)
Stephen Dorff
Billy at 14 (1 eps)
Craig Richard Nelson
The Waiter (1 eps)
Ian Abercrombie
Captain Burke (1 eps)
Harold Gould
Dr. Stanfield Weston (1 eps)
Matthew Perry
Bill at 18 (1 eps)
Ann Ryerson
Mrs. Bridges (1 eps)
Ami Foster
Wanda Sue (1 eps)
Grace Zabriskie
Eva Barrett (1 eps)
Robin Pearson Rose
Mrs. Fogal (1 eps)
Victor DiMattia
Rocco (1 eps)
Leo Geter
Dr. Ross (1 eps)
Thom Sharp
Dr. Mitch Helpern (1 eps)
Lindsay Parker
Jennifer (1 eps)
Mark Schiff
The Anesthesiologist (1 eps)
Ruth Silveira
The Nurse (1 eps)
Richard Fancy
The Lieutenant (1 eps)
Dean Fortunato
Cop (1 eps)
David Correia
Cop #2 (1 eps)
John DeMita
Cop #3 (as John Demita) (1 eps)
Jan Rabson
Cop #4 (1 eps)
Sam McMurray
Brent (1 eps)
Marcia Rodd
The Woman (1 eps)
Tommy Hinkley
The Bartender (1 eps)
Lela Ivey
Debbie (1 eps)
Abdul Salaam El Razzac
The Piano Player (1 eps)
Joe Hart
The Man (1 eps)
Jason Bernard
Mr. Noack (1 eps)
Brandon Quintin Adams
Peter (as Brandon Adams) (1 eps)
Tim Haldeman
The Waiter (1 eps)
Xavier Garcia
Esteban (1 eps)
Grace Albertson
The Woman (1 eps)
Donnelly Rhodes
Leonard (1 eps)
Diane Racine
Mother (1 eps)
Claude Knobler
Rick (1 eps)
Billy Gallo
Delivery Man (1 eps)
Katie O'Neill
Katie Taylor (1 eps)
Lee Wilkof
The Electrician (1 eps)
Barbara Babcock
Paula Conroy (1 eps)
Dierk Torsek
Mr. Millstein (1 eps)
Jarrett Lennon
Little Boy (1 eps)
Brad Hall
Chuck (1 eps)
Susan Anspach
Dr. Diane Hardy (1 eps)
Charles Levin
Stan (1 eps)
Jana Marie Hupp
Tracy (1 eps)
Nike Doukas
Liz (1 eps)
Whit Hertford
Alec (as Whitby Hertford) (1 eps)
Rand Stone
Jeff (1 eps)
Franc Luz
Eric (1 eps)
Tom Nibley
The Waiter (1 eps)
Paul Sand
Poko (1 eps)
Diana Webster
Mrs. Lundquist (1 eps)
Nicky Rose
Little Girl (1 eps)
Shaun Weiss
Little Boy (1 eps)
Ray Buktenica
Alan (1 eps)
Greg Kean
Brad (as Greg Kean Williams) (1 eps)
Michael Garfield
Doug (1 eps)
John Scott Clough
Jim (1 eps)
Cynthia Steele
Mother #1 (1 eps)
Mary Garripoli
Mother #2 (1 eps)
Matthew Kenemore
Sick Kid (1 eps)
Christopher Robin
Coughing Child (as Christopher Chas Robin) (1 eps)
Linda Thorson
Janice Brattle (1 eps)
James Staley
Ted (1 eps)
Jane Galloway
Lucy (1 eps)
Tony Longo
Stan (1 eps)
Gregory Itzin
Frank (1 eps)
Peter Hobbs
Dr. Garrison (1 eps)
Kat Sawyer-Young
Woman Doctor (1 eps)
William Bogert
Doctor #1 (1 eps)
Milt Oberman
Doctor #2 (1 eps)
Christine Belford
Fran (1 eps)
Ed Hooks
Mailman (1 eps)
Francis Guinan
Dr. Mitchell (1 eps)
Jake Jundef
The Boy (1 eps)
Richard Kind
Elton Sexton (1 eps)
Debra Engle
Mrs. Sexton (1 eps)
Billy O'Sullivan
Billy at 5 (1 eps)
Michael Lee Owens
Billy at 7 (1 eps)
Aeryk Egan
Billy at 11 (1 eps)
Zachary Benjamin
Little Kid (1 eps)
James Duane Polk
Delivery Man (1 eps)
David Rasche
Jack Trenton (1 eps)
Holly Fields
Little Carol (1 eps)
Candi Milo
Mrs. Ortiz (1 eps)
Teresa Ganzel
Sharon (1 eps)
Winston J. Rocha
Jorge (1 eps)
Jon Patrick Walker
Acid (1 eps)