And the shutters were sealed. And we have more gold here on Voga than in the rest of the known galaxy. Cybermen. DOCTOR: Cybermen. DOCTOR: No, but the Time Ring is designed with a slight safety margin. DOCTOR: Thousands of years before, Harry. DOCTOR: Who's the homicidal maniac? KELLMAN: Operating the Beacon to the last man? Planet of gold. SARAH: Alien? SARAH: Doctor! STEVENSON (on screen): Professor Kellman. They were trapped in the after end and left to die. This is Nerva Beacon. We have a plague infection. [SCENE_BREAK]
HARRY: Where are we going to put him, Commander? [SCENE_BREAK]
STEVENSON: The rivets have been taken out.
Plan: A: The Time Ring; Q: What device returns The Doctor, Sarah and Harry to Nerva Beacon thousands of years before they left? A: a space plague; Q: What wiped out the crew of Nerva Beacon? A: the culprits; Q: Who are the Cybermen and Professor Kellman? A: Professor Kellman; Q: Who is the geologist that the Doctor and Sarah find? A: Voga; Q: What planet is the Cybermen trying to wipe out? A: gold; Q: What is the planet Voga made of? A: Vogans; Q: What subterranean race defeated the Cybermen in a war? Summary: The Time Ring returns The Doctor, Sarah and Harry to Nerva Beacon thousands of years before they left. Where the Doctor, Sarah and Harry find the Beacon's crew have been wiped out by a space plague, only to discover the crew have been murdered by a cybermat and the culprits are the Cybermen and geologist Professor Kellman who bid to wipe out "Voga" a planet of gold, home of the subterranean Vogans who defeated the Cybermen in a war.