Borusa (The Deadly Assassin)

An incarnation of Borusa was a Time Lord who held the office of Lord Cardinal.

Biography
When the Doctor returned to Gallifrey in his fourth incarnation, he was framed by and Chancellor Goth for the assassination of the outgoing President. By this time, Borusa was Lord Cardinal on the High Council. Once the Doctor was shown to be innocent, Borusa set about "adjusting the truth" in the wake of the events, portraying the late Goth not as the Master's ally, but as a hero who had given his life to stop the Master. (TV: The Deadly Assassin)

Soon afterwards, Borusa became Lord Chancellor — illegally, according to the Doctor — and also regenerated, (TV: The Invasion of Time) the first of many premature regenerations that would occur following the Doctor coming back into his life. (PROSE: Doctor Who and the Krikkitmen)

Appearance
This incarnation of Borusa was a tall, hawk-eyed old man with snowy-white hair and a seamed and wrinkled face. His eyes sparkled with intelligence and, despite his age, his bearing was upright. (PROSE: Doctor Who and the Deadly Assassin)