Zennox

 was living on a planet which had a Cyberman head as a citadel. She was an archaeologist. The Sixth Doctor was cautious of her. She wanted to take the Cyber-Planner from the planet and put it in a museum and reactivate it. She wanted to install Finder as the Cyber-Planner but instead decided to use Zoe Heriot instead. (AUDIO: Last of the Cyberman)