Third Time Lord (Colony in Space)

In one incarnation, a Third Time Lord was active when the Time Lords' file on the Doomsday Weapon was lost.

Biography
After a report on the Doomsday Weapon went missing from the Time Lords' files, the Third Time Lord was part of a group that decided to send the Third Doctor to the planet Uxarieus to investigate. (TV: Colony in Space)

One account indicated that he, alongside the First and Second Time Lord he aided during the Doomsday Weapon crisis, were the same First, Second and Third Time Lord who had formed a High Tribunal to sentence the Second Doctor. (PROSE: Doctor Who and the Doomsday Weapon) The Third Time Lord at the trial, who was in a different body at the time, (TV: The War Games) was identified by the Scrolls of Gallifrey as Socra. (PROSE: The Legacy of Gallifrey) Despite the purported regeneration this would imply, (TV: Colony in Space) the Scrolls also confirmed the Third Time Lord at the trial, as the same Time Lord as the High Chancellor during the First Omega Crisis, (PROSE: The Legacy of Gallifrey) who looked as he had during the Second Doctor's tirla. (TV: The War Games, The Three Doctors) One account disputed the idea that the three Time Lords involved in the Doomsday Weapon crisis were the same as the Three who were involved in the Second Doctor's trial and later had further contacts with the Third Doctor. (PROSE: Legacy)

Behind the scenes

 * Graham Leaman later portrayed another Time Lord in The Three Doctors, identified by the novelisation as a Junior Time Lord.