Braxiatel also appears, as Cardinal Braxiatel, in the Doctor Who audio drama Zagreus and in the spin-off series Gallifrey. In these stories, which are set prior to the Bernice Summerfield stories in Braxiatel's timeline, he is a member of the High Council of Time Lords and a confidante of President Romana.
In Gallifrey: The Inquiry, it was revealed that the disastrous test of a timeonic fusion device which destroyed the planet Minyos prompted Braxiatel to begin collecting and preserving historical artifacts in case such widespread destruction ever happened. He also admitted that he had transgressed the Laws of Time by being in contact with his future regenerations.
In Gallifrey: Pandora, Braxiatel became Chancellor, but mere hours later had to use his mind to contain the past and present forms of an ancient Gallifreyan evil known as Pandora. As Pandora would be able to escape if he ever connected to the Matrix or telepathically communicated with another Time Lord mind, Braxiatel exiled himself from Gallifrey.
In Gallifrey: Warfare Romana destroyed the future form of Pandora (as well as its intelligence), at the cost of also destroying the Matrix. When Romana was removed from office in Gallifrey: Mindbomb, Braxiatel returned briefly to Gallifrey and assumed the post of Lord President, since there was no longer anywhere for the Pandora entity to escape to.
However, the ambitious Inquisitor Darkel goaded Braxiatel into losing control of Pandora, believing that it would destroy itself and Braxiatel's mind in the process. Braxiatel then revealed that only a remnant of the entity had ever been in his mind; the bulk of it had sought refuge in Darkel and Braxiatel had merely been the key that kept it restrained. So freed, Pandora consumed both Darkel and itself. Braxiatel returned to his exile, retaining the last fragments of Pandora within him.
However, Braxiatel was not done: hearing rumors of an impending threat against Gallifrey and deciding that in its weakened state the planet was doomed, he hatched a scheme to preserve the Time Lord biodata archive, containing the genetic patterns of all Time Lords, past and present, in the hopes of reconstructing Gallifrey after its inevitable fall. By the end of Gallifrey: Panacea, Gallifrey is on the brink of economic and social collapse as well as in danger of being overrun by a virus created by the terrorist organization Free Time. He had taken Romana, Leela, K9 II and the Time Lord's biodata bank out of time, in order to restore Gallifrey in the future. There, they find themselves unable to reenter normal space and time, but they can explore Gallifreys in alternate universes. In Gallifrey: Disassembled, he gets into an altercation with an alternate version of the Doctor. He's thrown into the time lines, seemingly lost forever. But in fact, he returns home, where he immediately meets Bernice Summerfield for the first time. This story also continues the implication that he is related to the Doctor, and further implies that he encouraged the Doctor to leave Gallifrey in the first place because the Time Lords wanted to kill him.
Read more about this topic: Braxiatel