The Master (The Warrior's universe)

In the Warrior's universe, an incarnation of the Master that the Warrior was unfamiliar with appeared at the Warrior's trial. The Master helped the Warrior seal the alternate timeline created by the Unified Skaroan Alliance in the Carrisent Particum. (AUDIO: Aftershocks)

Physical Appearance
The Master was an elderly man with thin, gray hair. He was wearing what seemed to be a robe. (AUDIO: Doctor of War: Genesis)

Behind the scenes
Although he is played by Geoffrey Beevers, it is not made clear if this Master is intended to be an analogue to or some other incarnation. The Warrior claims he has not met him before, though he was also suffering from memory loss, and it is not clear if the incarnation that fought with him in the Time War before the trial was the same one.