Page "Time Lord" Paragraph 1

Originally they were described as a powerful and wise race from the planet Gallifrey, from which the Doctor was a renegade ; details beyond this were very limited for the first decade of the series.

They later became integral to many episodes and stories as their role in the fictional universe developed.

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 incarnation and assisting them on many occasions.

After the series was resumed in 2005, the Time Lords were presented as no longer existing, having been destroyed by the Doctor at some intervening point during the Last Great Time War in which they became corrupted, lead by a tyrannical Lord President Rassilon willing to sacrifice the entirety of time and space for survival.

The Time Lords made a subsequent appearance as a race in 2010 when they schemed to escape the resulting time lock and resume their plan, as well as in the appearance of individuals such as the Master, and at times, inadvertent human-time lord hybrids.