Brigadier Lethbridge-Stewart

[close] Brigadier Alistair Gordon Lethbridge-Stewart, generally referred to simply as the Brigadier, is a fictional character in the British science fiction television series Doctor Who, created by writers Mervyn Haisman and Henry Lincoln and played by Nicholas Courtney. He is one of the founders of UNIT (United Nations Intelligence Taskforce, later Unified Intelligence Taskforce), an international organization that defends Earth from alien threats, and serves as commander of the British contingent. Presented at first as reluctant to accept the continuing aid of the Doctor, over time the Brigadier became one of the Doctor's greatest friends and his principal ally in defending the Earth. The Brigadier has received a DSO, a CMG, and an CBE.

As one of the series' most prominent recurring characters over its fifty-year history, the Brigadier appeared in 23 stories during the original run of Doctor Who, first appearing in the 1968 serial The Web of Fear opposite the Second Doctor (Patrick Troughton). The character made frequent appearances on the show following the introduction of the Third Doctor (Jon Pertwee) in 1970's Spearhead from Space. His final appearance in the program was in 1989's Battlefield opposite the Seventh Doctor (Sylvester McCoy). Nearly 20 years later, Courtney reprised the role in the spin-off programme The Sarah Jane Adventures in 2008, his last appearance prior to Courtney's death in 2011. That year, Doctor Who later paid tribute to Courtney by announcing the Brigadier had died with a line of dialogue in "The Wedding of River Song". Later still, a Cyberman avatar of the Brigadier also appears, and achieves some closure with the Twelfth Doctor (Peter Capaldi), in "Death in Heaven" (2014).

The 2012 episode "The Power of Three" introduced the Brigadier's daughter, new UNIT chief Kate Stewart (Jemma Redgrave). The character was originally created in the unlicensed video spin-off Downtime in 1995, in which the Brigadier also appeared. Kate becomes a recurring character making appearances alongside the Eleventh Doctor (Matt Smith) and Twelfth Doctor (Capaldi).