never signed a contract with RH
Justin Deas as Dr. Bucky Carter (July 1975 - July 1978) Appeared in 253 episodes
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Kaye de Lancey as Amy Morris (July 1980 - September 1980; October 1980) Appeared in 28 episodes
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Kathryn Dowling as Lilly Darnell #2 (July 1980 - September 1980) Appeared in 18 episodes
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Christine Ebersole as Lilly Darnell #1 (January 1980; May 1980 - June 1980) appeared in 10 episodes
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Ed Evanko as Dr. Alex McLean (September 1976 - February 1977) Appeared in 41 episodes
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Michael Fairman as Nick Szabo (July 1975 - June 1976) Appeared in 57 episodes
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Sarah Felder as Siobhan Ryan Novak #1 (July 1978 - July 1980) appeared in 272 episodes
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Robert Finoccoli as Dr. Patrick Ryan #3 (July 1979 - October 1979) Appeared in 23 episodes
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Nicolette Goulet as Mary Ryan Fenelli #4 (January 1979 - December 1979) Appeared in 83 episodes
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Malcolm Groome as Dr. Patrick Ryan (July 1975 - July 1978; February 1983 - 1988; January 1989)
Appeared in 394 episodes in first stint
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Rosalinda Guerra as Ramona Gonzalez, R.N. (July 1975 - December 1975) Appeared in 18 episodes
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Michael Hawkins as Frank Ryan #1 (July 1975 - November 1976) Appeared in 201 episodes
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Catherine Hicks as Dr. Faith Coleridge #3 (September 1976 - March 1978) Appeared in 208 episodes
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Dennis Jay Higgins as Sam Crowell (January 1976 - June 1976) Appeared in 39 episodes
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Patrick Horgan as Thatcher Ross (December 1978 - July 1979) Appeared in 30 episodes
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Trent Jones as Ken George Jones (May 1980 - October 1980)Appeared in 59 episodes
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Ilene Kristen as Delia Reid Ryan Ryan Coleridge #1 (July 1975 - January 1979; March 1982 - December 1983; September 1986 - January 1989) Appeared in 543 episodes in first stint
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Frank Latimore as Dr. Ed Coleridge (July 1975 - March 1976) Appeared in 66 episodes
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Thomas MacGreevy as Tom Desmond (April 1977 - September 1979) Appeared in 272 episodes
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Ty McConnell as Kenneth Castle (November 1975 - May 1976) Appeared in 53 episodes
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Megan McCracken as Nancy Feldman #2 (July 1978 - October 1978) Appeared in 21 episodes
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Robyn Millan as Delia Reid Ryan Ryan Coleridge #2 (January 1979 - February 1979) Appeared in 5 episodes
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Richard Muenz as Joe Novak (July 1979 - May 1980) Appeared in 129 episodes
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Kate Mulgrew as Mary Ryan Fenelli #1 (July 1975 - January 1978; April 1983; April 1986; January 1989) Appeared in 403 episodes in first stint
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Ana Alicia Ortiz as Alicia Nieves (March 1977 - July 1978) Appeared in 94 episodes
also known as Ana-Alicia
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Hannibal Penney, Jr. as Dr. Clem Moultrie (July 1975 - May 1978) Appeared in 142 episodes
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Peter Ratray as Dan Fox (September 1979 - December 1979) appeared in 33 episodes
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Andrew Robinson as Frank Ryan #2 (November 1976 - January 1978) Appeared in 164 episodes
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Lisa Sutton as Nancy Feldman #1 (June 1978) Appeared in 6 episodes
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Dianne Thompson as Teresa Donahue (September 1978 - January 1979)
as Poppy Lincoln
(March 1979 - June 1979)
Appeared in 66 episodes
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Kathleen Tolan as Mary Ryan Fenelli #3 (June 1978 - January 1979)
Appeared in 57 episodes
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Nana Tucker as Nancy Feldman #3 (October 1978 - September 1979)
Appeared in 81 episodes
also known as Nana Visitor
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Diana van der Vlis as Dr. Nell Beaulac (July 1975 - March 1976) Appeared in 78 episodes
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