Question: The actress that played Rose Buck in "Upstairs, Downstairs" also played what chacter in the tv series "Doctor Who"?

Context articles: Alfred Hitchcock Presents
Sara Kingdom
Alexander Faris
Sarah Gordy
Claire Nielson
John Alderton
Clive Morton
Richard Bellamy (Upstairs, Downstairs character)
Brian Osborne
Jean Marsh

Alfred Hitchcock Presents is an American television anthology series that was hosted and produced by Alfred Hitchcock; the program aired on CBS and NBC between 1955 and 1965.
 It featured dramas, thrillers, and mysteries.
 By the time it premiered on October 2, 1955, Hitchcock had been directing films for over three decades.
 "Time" magazine named it one of "The 100 Best TV Shows of all time".
 The Writers Guild of America ranked it #79 on their list of the 101 Best-Written TV Series tying it with "Monty Python's Flying Circus", "" and "Upstairs, Downstairs".
Sara Kingdom is a fictional character played by Jean Marsh in the long-running British science fiction television series "Doctor Who".
 A security officer for Mavic Chen from the 40th century, she later joined the First Doctor and Steven to work against Chen's interests.
 She is sometimes classed as a companion of the First Doctor but the BBC's official "Doctor Who" website does not include her in their list of companions.
 Her status as a companion is commented upon in its Episode Guide.
Samuel Alexander "Sandy" Faris (11 June 1921 – 28 September 2015) was a Northern Irish composer, conductor and writer, known for his television theme tunes, including the theme music for the 1970s TV series "Upstairs, Downstairs".
 He composed and recorded many operas and musicals, and also composed film scores (including for "Georgy Girl") and orchestral works.
 As a conductor, he was especially known for his revivals of Jacques Offenbach and Gilbert and Sullivan operettas.
Sarah Gordy (born c.1978) is a British actress who has Down syndrome.
 She is best known for her portrayal of Lady Pamela Holland in the 2010 BBC TV series of "Upstairs Downstairs".
 She has also acted in episodes of Call the Midwife, Holby City and Doctors.
 As well as these BBC shows, she has acted in short films, radio dramas, commercials and many theatre productions.
Claire Nielson (born Claire Isbister on April 1937 in Scotland) is a Scottish actress, primarily known for her television roles.
 On television, she played the wife of the belligerent American guest, Mr. Hamilton, in the "Waldorf Salad" episode of "Fawlty Towers", appeared as Jean 'Porridge' Carter, Geoffrey Stock's secretary, in the popular 1960s crime series "Ghost Squad" and played the wife of Rikki Fulton's character in many sketches of the Scottish Hogmanay show Scotch and Wry during the 1970s until 1999.
 Other TV credits include "Upstairs, Downstairs", "Monarch of the Glen", "The Brothers", "The Two Ronnies", "Z-Cars" and "Taggart".
 She also appeared as Barbara Grant in the 1971 film version of "Kidnapped", opposite Michael Caine and Trevor Howard.
John Alderton (born 27 November 1940) is an English actor who is best known for his roles in "Upstairs, Downstairs", "Thomas & Sarah", "Wodehouse Playhouse", "Little Miss" (original TV series), "Please Sir!
", and "Fireman Sam" (The original series).
 Alderton has often starred alongside his wife, Pauline Collins.
Clive Morton (16 March 1904 – 24 September 1975) was an English actor best known for playing upper class Englishmen, he made many screen appearances, especially on television.
 In 1955, he appeared in Laurence Olivier's "Richard III" and is recalled by fans of "Doctor Who" for his role as prison governor George Trenchard in "The Sea Devils" in 1972.
 He was Commander Rogue in the first series of the fondly-remembered children's TV series "Rogue's Rock" in 1974.
 One of his last roles was as an aged butler in an episode of "Upstairs Downstairs".
Richard Pemberton Bellamy, Viscount Bellamy of Haversham (1853–before 1936) is a fictional character in the ITV period drama "Upstairs, Downstairs", that was originally broadcast for five series from 1971 to 1975.
 He was portrayed by David Langton.
 In the 2010 revival of "Upstairs, Downstairs", Rose Buck refers to her late Master, Lord Richard Bellamy of Haversham, with the implication that Richard had died sometime between 1930 and 1936.
Brian Osborne (born 1940) is an English actor.
 He is best known for his roles in "Upstairs, Downstairs" and "The Sandbaggers".
 Osborne has also had minor roles in six "Carry On" films as well the TV series "Carry On Laughing".
Jean Lyndsey Torren Marsh, {'1': ", '2': ", '3': ", '4': "} (born 1 July 1934) is an English actress and writer.
 Marsh co-created and starred in the ITV series "Upstairs, Downstairs" (1971–75), for which she won the 1975 Emmy Award for Outstanding Lead Actress in a Drama Series for her performance as Rose Buck.
 She later reprised the role in the BBC's revival of the series (2010–12).
 Marsh also co-created the television series "The House of Eliott" in 1991.
 Her film appearances include "Cleopatra" (1963), "Frenzy" (1972), "The Changeling" (1980), "Return to Oz" (1985), "Willow" (1988) and "Monarch" (2000).