The Time Lords are a fictional group portrayed in the British science fiction television series Doctor Who, of which that series' main character, the Doctor, is a member. Time Lords are so called because they are able to travel in and manipulate time through technology to a far greater degree than any other civilization. Females of this group, such as Romana, are sometimes called Time Ladies, particularly in the tie-in fiction related to the programme. It is also implied heavily in the series that there are those from Gallifrey that are not Time Lords though it is not stated categorically either way (see Trial of a Time Lord, among others).
The nature and history of the Time Lords were gradually revealed as the television series progressed. Each story to feature them and their home planet added additional layers of complexity and intrigue, stemming from the dissatisfaction of various scriptwriters wrestling with the question of why the Doctor is in exile in the first place