Spandrell

Spandrell was Castellan of the Chancellery Guard on Gallifrey for many years. He was succeeded by Castellan Kelner. Spandrell was Castellan during the President's assassination, and led the subsequent investigating into the attack. He was very skeptical of the Fourth Doctor at first, but ended up becoming his ally in the unmasking of Chancellor Goth as the President's murderer. (DW: The Deadly Assassin)

Spandrell was persuaded to come out of retirement to serve under Lord President Flavia. (NA Blood Harvest, NA: Happy Endings, EDA: The Eight Doctors)