Patrick George "Pat" Troughton (, 25 March 1920 – 28 March 1987) was an English actor most widely known for his roles in fantasy, science fiction, and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969; he reprised the role in 1973, 1983, and 1985.