Nicholas Courtney (born William Nicholas Stone Courtney on December 16 1929) is a British television actor, most famous for playing Brigadier Alistair Gordon Lethbridge-Stewart in the British science fiction television series Doctor Who.

Nicholas Charles Palliser Courtney (born July 18, 1967 in _Launceston, Tasmania) was an Australian cricketer who played for the Tasmanian Tigers.

He made his debut against the touring Sri Lankans in the 1987-88 season, and made fairly regular appearances for the Tigers until the 1994-95 season.

Nicholas Courtney was born in Egypt, the son of a British diplomat. His early years were spent in Kenya and France and he was called up for National Service at the age of 18. After 18 months of duty in the British forces, Courtney joined the Webber Douglas drama school. He spent two years there and then did repertory theatre in Northampton. His next move was to London. During the 1960s he played some roles in popular TV series'. In 1965 he made an appearance in "Doctor Who" (1963) during the tenure of William Hartnell. The director, Douglas Camfield, remembered him and in 1967 cast him as Captain Knight in "Doctor Who" episode "The Web of Fear". He took the part of Lethbridge-Stewart, which was to become his most famous role, when the actor originally cast in the part had to drop out. At this time, Patrick Troughton was the star of the series. Shortly after this Courtney was offered the chance to play the role regularly and accepted. This guaranteed him work until 1975, when the character was written out of the series. He became a good friend of Jon Pertwee during his time on the programme, and returned in 1983, 1988 and 1989. His other television work has included a comedy with Frankie Howerd. Courtney has maintained a close association with "Doctor Who", narrating the documentary "30 Years in the TARDIS" and attending conventions and appearing in spin-offs.