Zero (Spring)

Lord Cardinal Zero was a member of the High Council of the Time Lords. Like the Doctor, he was a Prydonian. He was a member of the Council of the Great Mother and specialised in the politics of regeneration. ( AUDIO :  Spring )

Despite already having the title of Lord Cardinal the Fifth Doctor stated that Zero was only "Well on his way to getting a seat on the High Council" suggesting that it was possible to be a Cardinal without already having a seat on the High Council. (AUDIO: Spring)