William Jovanka

William Jovanka was the father of Tegan Jovanka. (TV: Logopolis) He owned a sheep farm in Australia, near Toowoomba. (AUDIO: The Butcher of Brisbane)

He always used to say that "if" was the most powerful word in the English language. (TV: Castrovalva; AUDIO: Psychodrome)

William was married to Joy, Tegan's mother. (PROSE: Divided Loyalties) When Kamelion tapped into Tegan's memories, he was overwhelmed by childhood memories of Tegan's parents and Aunt Vanessa, as well as the Fifth Doctor's memories of Gallifrey. (PROSE: Qualia)

According to one account, he had died by 1981. (PROSE: Divided Loyalties) According to another, he was alive as of 1987 when he was hospitalised by a snake bite, reviving Tegan's fears of the Mara. (PROSE: Encounter on Burnt Snake Flat)