he acted in many plays, including Agatha Christie's Rule of Three and The Devil's Disciple, where he met and formed a friendship with Tyrone Power. Television career David Langton had started his television career in the 1950s and went on in the 1960s to appear in The Troubleshooters, Out of the Unknown, The Avengers, The Champions, Dr. Finlay's Casebook and Special Branch. He also appeared in films such as The Trials of Oscar Wilde (1960), A Hard Day's Night (1964) and The Liquidator (1965). In 1968, director Douglas Camfield chose Langton to portray Colonel Lethbridge-Stewart in the Doctor Who serial The Web of Fear, but Langton dropped out to perform in a TV play before production began. Camfield cast Nicholas Courtney instead. Langton achieved international notice for playing family patriarch Richard Bellamy in the period drama Upstairs, Downstairs which began in 1971. He was given the role after a chance encounter with producer John Whitney at the Garrick Club in London. During some of Upstairs, Downstairs'''s run, Langton actually lived in Eaton Place, the square in Belgravia where Upstairs, Downstairs was set and where exterior scenes were filmed. Later years Following the success of Upstairs, Downstairs, Langton appeared in the 1972 BBC Television adaptation of Dorothy L. Sayers's Lord Peter Wimsey mystery Clouds of Witness, as the Duke of Denver (older brother to Lord Peter Wimsey); the film The Incredible Sarah (1976); and Robert Altman's science fiction film Quintet (1979), starring Paul Newman. In the 1980s, he appeared on television in The Spoils of War and Witness for the Prosecution (1982); he played Sir Charles Baskerville in the 1983 HBO film The Hound of the Baskervilles, as well as Lord Mountbatten of Burma in Charles & Diana: A Royal Love Story (1982), and H. H. Asquith in Number 10. He played Victor Frankham in Hammer House of Mystery and Suspense (1984), and appeared in the film The Whistle Blower (1986) opposite Michael Caine. His final television appearances were in The Case-Book of Sherlock Holmes (The Illustrious Client) and Absolutely in 1991, and The Good Guys in 1992. Langton also continued to work as a theater actor, appearing in Night and Day, Ross and Beyond Reasonable Doubt''. Langton married his second wife, Claire Green, the former wife of TV host Hughie Green, in May 1975. He suffered a fatal heart attack and died in Stratford-upon-Avon in 1994. In his obituaries it