Visionary

A Visionary was a Time Lord who could see the future. By the time of Romana II, Gallifrey had not seen a Visionary in centuries. (AUDIO: Annihilation)

By the end of the Last Great Time War, was served by the Visionary (TV: The End of Time) who, according to one account, was a Time Lord who went mad when she looked into the Untempered Schism. (PROSE: A Brief History of Time Lords) According to another, she belonged to the Sisterhood of Karn. (AUDIO: Homecoming)

In an alternative timeline, Lord Prydon was served by the Visionary Cassandra. (AUDIO: Annihilation)