The Mind's Eye (A Three-Part Story) This is a warning to all space farers. You must keep away from this planet. It’s hostile, repeat, hostile. On a planet with no name, the Doctor finds himself confronted by a faulty memory and some killer plants. In a distant galaxy, Erimem leads a troubled empire. Back on Earth, Peri tells her son about the good old days when she used to travel with a man called The Doctor. AND Mission of the Viyrans (A One-Part Story) The Doctor and Peri take a holiday on the planet Gralista Social, but soon discover they aren't the only time-travelling aliens in town.