Világ

 was a planet invaded by the Killorans. The inhabitants were able to defeat the invaders. It was visited by the Doctor and Evelyn weeks before the invasion (AUDIO: Arrangements for War (audio story)), 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 returns with Mel to see how Evelyn is doing. Unknown to Evelyn, she has been the subject of experimentation with Killoran DNA. The Doctor manages to undue the damage done to her. While recovering, she is visited by the Seventh Doctor. (AUDIO: Thicker than Water (audio story))