Világ

 was a planet invaded by the Killorans. The inhabitants were able to defeat the invaders. It was visited by the Sixth Doctor and Evelyn weeks before the invasion, (AUDIO: Arrangements for War) who then returned a year later. At that time, Evelyn decided to stay and marry one of the Világians she had met previously. Two years later, the Doctor returned with Mel to check up on Evelyn. Unknown to Evelyn, she was the subject of experimentation with Killoran DNA. The Doctor managed to undue the damage done to her. While recovering, she was visited by the Seventh Doctor. (AUDIO: Thicker than Water)