Sheik Haroun Al Raschid(Played by Kaleel Sakakeeny, 1981)
Gordon Allison (Played by Sam Stoneburner, 1981)
Amelia (Played by Lauren Kristyne, 1981)
Treat Baker (Played by Dan Marderosian, 1985–1986)
Sam Banacek (Played by Jack Palmer, 1987)
Private Detective Bauer (Played by William Gleason, 1981)
Marguerite Beaulac (Played by
Gale Sondergaard, 1976;
Anne Revere, 1977)
Nell Beaulac (Played by
Diana van der Vlis, 1975–1976)
Dr. Seneca Beaulac (Played by
John Gabriel, 1975–1985, 1988–1989)
Tiger Bennett (Played by Duncan Gamble, 1984–1985)
Dr. Evelyn Blair(Played by Pamela Burrell 1981)
Chessy Blake (Played by
Susan Scannell, 1985)
Stanley Bosworth (Played by
Gregory Salata, 1983)
Mitch Bronski (Played by
James Sloyan, 1982–1983)
Sal Brooks(Played by Tony Schultz, 1981)
Zena Brown (Played by
Tichina Arnold, 1987–1989)
Diana Buckman(Played by Liz Kemp, 1981)
Anne Burney (Played by Jody Catlin, 1976–1978)
Orson Burns (Played by Nicolas Surovy, 1981;
Robert Desiderio, 1981–1982)
NIck Bush (Played by Richard Milanesi, 1981)Cyril Campion(Played by Bill Moor, 1981)
Diana Buckminster Carter (Played by Sally Chamberlin, 1975–1976)
Dr. Bucky Carter (Played by
Justin Deas, 1975–1978)
Kenneth Castle (Played by Ty McConnell, 1975–1976)
Claudius Church (Played by
Charles Cioffi, 1980)
Dr. Adam Cohen (Played by
Sam Behrens, 1979–1980)
Dr. Ed Coleridge (Played by
Frank Latimore, 1975–1976)
Edmund Strong Coleridge (Played by Buddy Schultz, 1977–1979)
Dr. Faith Coleridge (Played by Faith Catlin, 1975–1976;
Nancy Barrett, 1976;
Catherine Hicks, 1976–1978;
Karen Morris-Gowdy, 1978–1983, 1989; Katherine Justice, 2 episodes, 1979)
Grace Coleridge (Played by Caroline Wilde, 1989)
Jillian Coleridge (Played by
Nancy Addison Altman, 1975–1988, 1989)
Dr. Roger Coleridge (Played by
Ron Hale, 1975–1989)
Olivia Coleridge (Played by Kelly & Melissa Nevins, 1987–1988; Jennifer & Katherine Ostroth, 1988–1989)
Annie Colleary (Played by
Pauline Flanagan, 1979-?, 1987)
Sean Colleary (Played by Ralph Williams, 1979)
Silvio Conti (Played by
Cesare Danova, 1988–1989)
Evan Cooper (Played by
Irving Allen Lee, 1985–1989)
Matthew Crane (Played by
Harve Presnell, 1984)
Sam Crowell (Played by Dennis Jay Higgins, 1976)
Dr. Concetta D'Angelo Ryan (Played by Lois Robbins, 1987–1988, 1989)
Mark D'Angelo (Played by Peter Love, 1986–1988)
Lily Darnell(Played by
Christine Ebersole, 1980; Kathryn Dowling, 1980)
Mort Dash (Played by John Sudol, 1981)
Dan Davis (Played by
George Hearn, 1978;
Tom Mason, 1978)
Tom Desmond (Played by Thomas MacGreevy, 1977–1979)
Liam Donahue (Played by James Rogan, 1977–1978)
Teresa "Terry" Donahue (played by
Dianne Thompson, 1979)
Diana Douglas (Played by
Tracey Ross, 1986–1987)
Mr. Homer Dowd (Played by
Keith Charles, 1986–1989)
Chantal DuBujak (Played by
Marisa Pavan, 1985) Max DuBujak's Mother
Gabrielle Dubujak (Played by
Susan Scannell, 1985)
Jacqueline DuBujak Novak (Played by
Gerit Quealy, 1983–1985, 1987)
Max DuBujak (Played by
Daniel Pilon, 1983–1987, 1988)
Monsignor Farrell (Played by
William Hickey, 1985)
Beryl Feldman (Played by Anna Berger, 1979)
Dave Feldman (Played by Joseph Leon, 1977–1979; Arthur Hammer, 1979)
Nancy Feldman (Played by Lisa Sutton, 1978; Megan McCracken, 1978;
Nana Visitor, 1978–1979)
Jack Fenelli (Played by Michael Levin, 1975–1989)
Ryan Fenelli (Played by Kerry McNamara, 1977–1980; Jenny Rebecca Dweir, 1980–1984;
Yasmine Bleeth, 1985–1989)
Flash (Played by Melcourt Poux, 1984–1985)
Dan Fox (Played by Peter Ratray, 1979–1981)
Ethyl Franklin (Played by Alaina Reed, 1983)
Miriam George(Played by
Rosetta LeNoire, 1977;
Frances Foster, 1977–1978;
Minnie Gentry, 1979)
Ramona Gonzalez, R.N. (Played by Rosalinda Guerra, 1975)
Nurse Grady(Played by Lenka Peterson 1981)
Antoine Graham(Played by Antoine Robinson, 1988–1989)
Ken Graham (Played by
Corbin Bernsen, 1983–1985)
Ethel Green (Played by
Nell Carter, 1978–1979)
Dave Greenberg (Played by Scott Holmes, 1984–1985)
Charlotte Greer (Played by
Judith Chapman, 1983)
Horace Grimley (Played by Richard Woods, 1978–1979)
Emily Hall (played by Cynthia Dozier, 1987–1988)
Chris Hannold (played by Lydia Hannibal, 1986–1988, 1989)
Kimberly Harris (played by
Kelli Maroney, 1979–1981, 1982–1983)
Hartman (Played by François Giroday, 1986)
Katherine Hayes (Played by Barbara Chase, 1981)Stamford Hutchinson (played by
DeVeren Bookwalter, 1983–1984)
Bill Hyde (played by David Sederholm, 1983–1985)
Rick Hyde (played by
Grant Show, 1984–1987)
Sister Mary Joel (played by
Sylvia Sidney, 1975–1976;
Nancy Coleman, 1976; Natalie Priest, 1976–1978;
Jacqueline Brookes, 1982;
Rosemary Prinz, 1988–1989)
Ken George Jones(played by
Trent Jones, 1980)
Yvonne Kaheel(Played by Patricia Triana, 1981)
Amanda Kirkland (played by
Mary Page Keller, 1982–1983; Ariane Munker, 1983)
Catsy Kirkland (played by
Christine Jones, 1982–1983)
Hollis Kirkland (played by
Peter Haskell, 1982–1983)
Leigh Kirkland (played by
Felicity LaFortune, 1983–1985, 1988–1989)
Devlin Kowalski (played by
Leslie Easterbrook, 1985–1987)
D.J. LaSalle (played by
Christian Slater, 1985)
Steve Latham (played by
Franc Luz, 1984)
Craig Le Winter (Played by Paul Carlin, 1981)
Wes Leonard (played by
David Rasche, 1978–1981)
Loraleen Lewis (played by Patti Emler, 1985–1986)
Nancy Don Lewis (played by
Maria Pitillo, 1987–1989)
Poppy Lincoln (played by Dianne Thompson, 1979)
Polly Longworth(played by
Molly McGreevey, 1977–1981)
Kevin MacGuinness (played by
Malachy McCourt, 1975–1980, 1981–1982, 1983, 1988–1989)
Teddy Malcolm (played by
David Bailey, 1988–1989)
Malachy Malone (played by
Regis Philbin, 1987–1988)
Man in the Green Hat(Played by Harris Laskawy, 1979–1980)
Evelyn Marchero (Played by
Renée Lippin, 1978, 1979)
Dr. Jerry Marcus(Played by Bryan Clerk, 1981)
Jumbo Marino (played by Fat Thomas, 1975–1981)
Sgt. McInerny(Played by Donald Silva, 1981)
Martha McKee(Played by
Tovah Feldshuh, 1976; Dorrie Kavanaugh, 1977)
Dr. Alex McLean (Played by
Ed Evanko, 1976–1977)
Father McShane (played by John Perkins, 1975–1989)
Thomas Mendenhall (played by Richard Briggs, 1981–1984, 1988–1989)
Fenno Moore (played by
Casey Biggs, 1988–1989)
Amy Morse(played by Kaye de Lancey, 1980)
Dr. Clem Moultrie (played by Hannibal Penney, Jr., 1975–1978)
Neil Mulcahy (played by Robert Stattel, 1988)
Cicero Murphy(Played by
Morgan Freeman, 1981)
Alicia Nieves (Played by
Ana Alicia, 1977–1978)
Angel Nieves (Played by Jose Aleman, 1977–1978)
Joe Novak(Played by
Richard Muenz, 1979–1980;
Roscoe Born, 1981–1983, 1988; Michael Hennessy, 1983–1984; Walt Willey, 1986–1987)
Sean Novak (Played by
Danny Tamberelli, 1986–1987, 1988–1989)
Laslo Novotny (Played by Fred Burstein, 1983–1985, 1986-1987)
Tiso Novotny (Played by
David Clarke, 1979–1980)
Lori Nuzzo (Played by Ann De Salvo, 1980–1981)
Dr. Pagano(Played by David Faulkner, 1977; Gene Rupert, 1978)
Anna Pavel(Played by Joan Loring, 1979–1980)
Michael Pavel, Jr. (Played by
Michael Corbett, 1980–1981)
Leonie Peach (Played by
Angela Bassett, 1987)
Matt Pearse (Played by
Tom Aldredge, 1979–1982)
Rose Pearse Melina (Played by Rose Alaio, 1980–1981)
Henry Popkin (Played by
Fisher Stevens, 1983)
Mirabelle Posnick (Played by Ellen March, 1981)
Preston Post (Played by
Lance Henriksen, 1980)
Sydney Price (Played by
Robin Greer, 1983–1985)
Lawrence Prince (Played by Stefano LoVerso, 1983–1984)
Ralph Pugh(Played by
John Rothman, 1981)
Cynthia Ramsey(Played by Lynnda Ferguson, 1981)
Harlan Ransome(Played by Drew Snyder, 1986)
Lizzie Ransome Ryan(Played by Catherine Larson, 1986–1989)
Bob Reid(Played by
Earl Hindman, 1975–1984, 1988–1989)
Delia Reid Ryan Ryan Coleridge Crane(Played by Ilene Kristen, 1975–1979, 1982–1983, 1986–1989; Robyn Millan, 1979;
Randall Edwards, 1979–1982;
Robin Mattson, 1984)
Dr. James Ross(Played by James Congdon, 1978–1981)
Thatcher Ross(Played by Patrick Horgan, 1978–1979)
Georgia Rothschild(Played by Gloria Cromwell, 1975–1983)
Jonas Roving(Played by Michael Wagner, 1981)
Richard Rowan(Played by
Lewis Arlt, 1987–1988)
Robert Rowan(played by Michael Palance, 1988–1989)
Sherry Rowan(Played by
Diana van der Vlis, 1987–1989)
George Russell(Played by
Lee Wallace, 1981)
Barry Ryan(Played by
Richard Backus, 1980–1981)
Elizabeth Jane "E.J." Ryan(Played by
Maureen Garrett, 1981–1982)
Elizabeth Shrank Ryan(Played by
Pamela Blair, 1980)
Francis "Frank" Ryan(Played by Michael Hawkins, 1975–1976;
Andrew Robinson, 1976–1978;
Daniel Hugh Kelly, 1978–1981;
Geoffrey Pierson, 1983–1985; John Sanderford, 1985–1989)
Johnny Ryan(Played by Bernard Barrow, 1975–1989)
John Reid Ryan(Played by
Jadrien Steele, 1975–1985;
Jason Adams, 1986–1989)
Cathleen Ryan Thompson (Played by Nancy Reardon, 1976–1980)
Maeve Colleary Ryan(Played by Helen Gallagher, 1975–1989)
Mary Ryan Fenelli(Played by Kate Mulgrew, 1975–1978, 1983, 1986, 1989; Mary Carney, 1978; Kathleen Tolan, 1978–1979;
Nicolette Goulet, 1979).
Mary Ryan (as a child)(Played by Yvette Deas, 1977)
Owen "Owney" Ryan(Played by Jamie O'Neill, 1987–1989)
Dr. Patrick Ryan(Played by Malcolm Groome, 1975–1978, 1983–1988, 1989; John Blazo, 1978–1979; Robert Finoccoli, 1979; Patrick James Clarke, 1982–1983)
Siobhan Ryan Novak(Played by Sarah Felder, 1978–1980;
Ann Gillespie, 1981–1982;
Marg Helgenberger, 1982–1986; Carrell Myers, 1986–1987; Barbara Blackburn, 1988–1989)
Chaz Saybrook (Played by Brian McGovern, 1987–1989)
Catie Schall (Played by Elaine Bromka, 1987)
Marian "Schultzie" Schultz (Played by Vera Lockwood, 1980–1982)
Mrs. Shaw(Played by Betty Low, 1981)
Ben Shelby (aka Ben Shelley) (Played by
James Wlcek, 1987–1989)
Bess Shelby (Played by
Gloria DeHaven, 1983–1987)
Maggie Shelby (Played by
Cali Timmins, 1983–1988, 1989)
Pru Shephard (Played by
Traci Lin, 1984–1985)
Betty Sherman (Played by Betty Alley, 1985–1986)
Eliot Silverstein (Played by
Joe Silver, 1980)
Howard Slavin(Played by
David Gale, 1981)
Constance Small, R.N. (Played by
Ethel Ayler, 1980–1981)
Dakota Smith (Ryan) (Played by Christopher Durham, 1985–1988)
Spencer Smith(Played by
Lester Rawlins, 1981)
Samuel Addison Snow(Played by John Seitz, 1979)
Sgt. Jim Speed (Played by MacKenzie Allen, 1981–1982)
Matthew Strand (Played by
Steve Fletcher, 1988–1989)
Nick Szabo (Played by
Michael Fairman, 1975–1976, 1977)
Serena "Reenie" Szabo (Played by
Julia Barr, 1976)
Dr. Gloria Tassky (Played by
Francine Tacker, 1985)
Pamela Thatcher(Played by Ellen Barber, 1981)
Art Thompson (Played by Gregory Abels, 1976)
Deirdre Thompson (Played by Rachel Robinson, 1976)
Katie Thompson (Played by Lauren O'Bryan, 1984;
Julia Campbell, 1984–1985)
Daniel Thorne (Played by
Chip Zien, 1981)
Alexei Vartova (Played by
Dominic Chianese, 1981;
Leonardo Cimino, 1982)
Detective Vaughan (Played by Mark Werheim, 1987–1988)
Vinnie Vincent (Played by
Sherman Howard, 1986–1987)
Denny Walston (Played by Lauren K. Woods, 1985–1986)
Melinda Weaver Ryan (Played by
Nancy Valen, 1985–1987)
Marshall Westheimer (Played by William Kiehl, 1975–1983; Robert Burr, 3 episodes 1977-1979)
Aristotle Benedict White(Played by
Gordon Thomson, 1981–1982)
Barbara Wilde (Played by
Judith Barcroft, 1981–1982; Delphi Harrington (1981))
Nurse Williams(Played by Anne Churchill, 1981)
Jeremy Winthrop(Played by Herb Anderson, 1984–1985)
Bill Wolfston (Played by Seth Allen, 1981; Stephen Vinovich, 1981)
Perry Wood(Played by Frank Biancamano, 1981)
Rae Woodard(Played by
Louise Shaffer, 1977–1984, 1989; Judith McGilligan, May 1978)
William Price Woodard (Played by
Wesley Addy, 1977–1978)