High Quality Content by WIKIPEDIA articles! UNIT (UNified Intelligence Taskforce, or United Nations Intelligence Taskforce) is a fictional military organisation from the British science fiction television series Doctor Who, Torchwood and The Sarah Jane Adventures. Operating under the auspices of the UN, its purpose is to investigate and combat paranormal and extraterrestrial threats to the Earth. In the original Doctor Who series, several UNIT personnel (such as The Brigadier) played a major role in the programme.