Gallifreyan

From the planet gallifrey, a race of the powerful and wise, having the command of time travel technology and their non-linear perception of time.Time Lords were said to have been destroyed during the Last Great Time War but eventually survived the war in the Day of the Doctor.
They developed a culture of custodianship and time-related technologies based on this perception which includes strictly controlled space/time travel machines (known as "TARDISes") and monitoring devices to travel through time and to prevent time from being subverted or abused—although actual action was described as rare in practice due to their traditional policy of strict non-interference and neutrality. They can act to manipulate timelines of a wide range of events and individuals, so long as they do not cross back into their own timeline. Over subsequent episodes their history, their development of time manipulation, and their internal politics were touched upon, with Time Lord society portrayed as a stagnated ceremony-bound oligarchy and their past having descended into myth and legend. The Doctor became at times an ally, being appointed their president during his fourth, fifth, and twelfth incarnations and assisting them on many other occasions.