• 
  Pat Morita

  Bartender (1 episode, 1972)
• 
  Fred Willard

  John Tobin (1 episode, 1975)
• 
  Ralph Bellamy

  Alan Dreeben
• 
  Morgan Fairchild

  Linda / Bianca
• 
  Emmaline Henry

  Mrs. Walker (2 episodes, 1973-1977)
• 
  Macon McCalman

  Dr. Malcom (1 episode, 1977)
• 
  Jack Riley

  Elliot Carlin (76 episodes, 1972-1978)
• 
  Keenan Wynn

  Dr. Albert (1 episode, 1975)

• 
  Heather Menzies

  Debbie Borden (1 episode, 1973)
• 
  John Fiedler

  Mr. Emil Peterson (15 episodes, 1972-1978)
• 
  Ron Glass

  Elevator Repairman (1 episode, 1973)
• 
  Mike Henry

  Frank Nugent (1 episode, 1975)
• 
  Loni Anderson

  Leslie Greely (1 episode, 1977)
• 
  Ron Masak

  Mike Mitchell (1 episode, 1972)
• 
  Jeff Donnell

  Little Woman (1 episode, 1978)

• 
  Tovah Feldshuh

  Veronica Kidd (1 episode, 1977)
• 
  Lilyan Chauvin

  Olga (1 episode, 1973)
• 
  Zohra Lampert

  Janine (1 episode, 1973)
• 
  Howard Morris (I)

  Shorty Vance (1 episode, 1976)
• 
  Russ Grieve

  Leo, P.D.  (2 episodes, 1974-1975)
• 
  Mel Stewart

  Mr. Dabney (1 episode, 1973)
• 
  Julius Harris

  Mr. Billings (1 episode, 1973)
• 
  Penny Marshall

  Stewardess (1 episode, 1972)
• 
  Richard Libertini

  Dr. Franklin Pitt  (2 episodes, 1977)
• 
  Jeff Corey

  Dr. Scott Rivers (1 episode, 1973)
• 
  Raul Julia

  Gregory Robinson (1 episode, 1974)
• 
  Michael Evans

  Maitre d' (1 episode, 1977)
• 
  David Hedison

  Steve Darnell (1 episode, 1978)
• 
  Quinn K. Redeker

  Dr. Dalton (1 episode, 1975)
• 
  Martha Scott

  Mrs. Martha Hartley (7 episodes, 1972-1977)
• 
  M. Emmet Walsh

  Jack Hoover (1 episode, 1972)
• 
  Ron Rifkin

  Jeff Boggs (1 episode, 1974)
• 
  Michael Lerner

  Mr. Carolla (1 episode, 1973)
• 
  Milton Selzer

  Mr. Brimskill (1 episode, 1974)
• 
  Malcolm Atterbury

  Mr. Arbogast (1 episode, 1976)
• 
  Bill Zuckert

  Mr. Kreever (1 episode, 1978)
• 
  Alan Hewitt

  Mr. Warner (1 episode, 1972)
• 
  Rene Auberjonois

  Alan Durocher (1 episode, 1975)
• 
  William Redfield

  Arthur Hoover  (2 episodes, 1972-1976)
• 
  Allen Garfield

  Manager (1 episode, 1973)
• 
  Rhoda Gemignani

  Joan Rossi  (3 episodes, 1973-1974)
• 
  Katherine Helmond

  Dr. Webster (1 episode, 1973)
• 
  Karen Ericson

  Peggy Ann (1 episode, 1978)
• 
  Alan Haufrect

  Felon (1 episode, 1977)
• 
  Teri Garr

  Miss Brennan  (2 episodes, 1973-1974)
• 
  Alberto Morin

  Waiter (1 episode, 1973)
• 
  Robert Ridgely

  Elevator Repair Man  (2 episodes, 1973-1977)
• 
  Peter Bonerz

  Dr. Jerry Robinson (142 episodes, 1972-1978)
• 
  George Wyner

  'Flipper', Rex Pottinger  (2 episodes, 1975)
• 
  Gene Blakely

  Dr. Ralph Tetzi  (2 episodes, 1973-1974)
• 
  Helen Page Camp

  Mrs. Prince  (2 episodes, 1972)
• 
  Samantha Harper

  Nurse Burke (1 episode, 1973)
• 
  Cynthia Harris

  Diane Nugent (1 episode, 1975)
• 
  Henry Winkler

  Miles Lascoe (1 episode, 1974)
• 
  Barnard Hughes

  Herbert Hartley (3 episodes, 1974-1978)
• 
  Richard Foronjy

  Artie Berkowitz (1 episode, 1975)
• 
  David L. Lander

  Milt the Delivery Boy (1 episode, 1974)
• 
  Julie Payne

  Dr. Sharon Rudell (1 episode, 1974)
• 
  Walker Edmiston

  Sergeant Webber (1 episode, 1977)
• 
  Oliver Clark

  Mr. Ed Herd (8 episodes, 1974-1977)
• 
  Mia Bendixsen

  Student (1 episode, 1972)
• 
  Jennifer Warren

  Ruth Corley (1 episode, 1975)
• 
  John Holland

  Brian McDermott (1 episode, 1976)
• 
  Pat McCormick

  Strange Man (1 episode, 1973)
• 
  Bob Newhart

  Dr. Robert 'Bob' Hartley (142 episodes, 1972-1978)
• 
  John Ritter

  Dave (1 episode, 1974)
• 
  James Hong

  Man (1 episode, 1972)
• 
  Jay Kogen

  Jay (1 episode, 1975)
• 
  Robert George

  Dr. Robert 'Bob' Hartley (142 episodes, 1972-1978)
• 
  J.R. Miller

  Kid (1 episode, 1978)
• 
  K.C. Martel

  Kid (1 episode, 1978)
• 
  Carl Gottlieb

  Mr. Kuberski (1 episode, 1974)
• 
  James Sikking

  Dick (1 episode, 1972)
• 
  Lucy Lee Flippin

  Darva (1 episode, 1976)
• 
  Patricia Smith

  Margaret Hoover (7 episodes, 1972)
• 
  Louise Lasser

  Mrs. Radford (1 episode, 1972)
• 
  Leonard Stone

  Dr. Ned Podbillion (1 episode, 1976)
• 
  Max Showalter

  Dr. Morgan (1 episode, 1977)
• 
  Tom Poston

  Cliff Murdock (5 episodes, 1975-1977)
• 
  Lou Cutell

  Delivery Man  (2 episodes, 1974-1978)
• 
  Penny Fuller

  Nancy Brock (1 episode, 1972)
• 
  Will Mackenzie

  Larry Bondurant (8 episodes, 1975-1978)
• 
  Greg Lewis

  Man (1 episode, 1977)
• 
  Jenna McMahon

  Shirley Wolfson (1 episode, 1973)
• 
  Jack Bender

  Paul Sanders (1 episode, 1973)
• 
  Bernie Kopell

  Dr. Arnold (1 episode, 1972)
• 
  Brooke Adams

  Mitzi Margolis (1 episode, 1976)
• 
  Joseph R. Sicari

  Salesman (1 episode, 1975)
• 
  Larry Gelman

  Dr. Bernie Tupperman (13 episodes, 1972-1976)
• 
  Ann Patchett

  Dave Death  (2 episodes, 1973-1977)
• 
  Tierre Turner

  Wally Carson (1 episode, 1976)
• 
  Michael Conrad

  Mr. Trevesco (2 episodes, 1973-1974)
• 
  Sharon Gless

  Rosalie Shaeffer (1 episode, 1974)
• 
  Veronica Hamel

  Rosemary (1 episode, 1976)
• 
  Suzanne Pleshette

  Emily Hartley (141 episodes, 1972-1978)
• 
  Marcia Wallace

  Carol Kester  (139 episodes, 1972-1978)
• 
  Mariette Hartley

  Marilyn Dietz (1 episode, 1973)
• 
  Joyce Van Patten

  Connie Miller (1 episode, 1973)
• 
  Sorrell Booke

  Mr. Perlmutter (1 episode, 1976)
• 
  Bruce Kirby

  Dr. Klein (1 episode, 1973)
• 
  Titos Vandis

  Gene the Janitor (1 episode, 1975)
• 
  Amzie Strickland

  Bakerman Character  (2 episodes, 1976-1978)
• 
  Archie Hahn

  Bellman  (2 episodes, 1972-1973)
• 
  Lawrence Pressman

  Ed Hoffman (2 episodes, 1974-1975)
• 
  Bert Rosario

  Mr. Ortiz  (2 episodes, 1977-1978)
• 
  Shizuko Hoshi

  Hostess  (2 episodes, 1972-1973)
• 
  Ellen Weston

  Sarah Harris (1 episode, 1975)
• 
  Sondra Currie

  Nora Dubois (1 episode, 1977)
• 
  Rose Gregorio

  Janet Hoffman (1 episode, 1974)
• 
  Henry Corden

  Nenn the Plumber (1 episode, 1973)
• 
  John Crawford

  Vern Hackler (1 episode, 1978)
• 
  Daniel J. Travanti

  Mr. Gianelli (1 episode, 1974)
• 
  James Burrows

  Maintenance Man (1 episode, 1977)
• 
  Ann Rutherford

  Aggie Harrison (2 episodes, 1973-1974)
• 
  Nora Marlowe

  Joanie  (3 episodes, 1972-1975)
• 
  Richard Roat

  Dr. Thompson (1 episode, 1977)
• 
  Robert Pine

  Mel (1 episode, 1977)
• 
  Robert Costanzo

  Sal Petrone (1 episode, 1978)
• 
  John McMartin

  Reverend Daniel Bradford (1 episode, 1973)
• 
  John Anderson

  Mr. Charlie Colton (1 episode, 1974)
• 
  Ann Weldon

  Adele Sinclair (1 episode, 1974)
• 
  Jack Bernardi

  Waiter (2 episodes, 1972)
• 
  Gail Strickland

  Courtney Simpson (2 episodes, 1974-1976)
• 
  Matthew Laborteaux

  Richie (1 episode, 1976)
• 
  Howard Hesseman

  Craig Plager  (7 episodes, 1974-1978)
• 
  Ron Vernan

  Police Officer (1 episode, 1977)
• 
  Mildred Natwick

  Grace Dubois (1 episode, 1977)
• 
  Mary-Robin Redd

  Susan Wick (1 episode, 1974)
• 
  Bill Daily

  Howard Borden (139 episodes, 1972-1978)
• 
  Cliff Osmond

  Leonard DePaolo (1 episode, 1975)
• 
  Peter Brown

  Stan Conners (1 episode, 1972)
• 
  Harvey J. Goldenberg

  Barry Gorman (1 episode, 1972)
• 
  Howard Platt

  Dr. Phil Newman (6 episodes, 1973-1976)
• 
  Michael Alldredge

  Burt (1 episode, 1978)