Yula

Yula was the homeworld of the Yulians. The Fourth Doctor and Sarah Jane Smith visited the planet at a time when the Yulians' Communal Will was under psychic attack. The Doctor traced the source to the planet Crellium, dealt with the threat of Krem-ling and the emissaries of Drakka, then returned to Yula. (PROSE: The Vampires of Crellium)