Nicola Savage

 was the scientist in charge of finding out what happened on Chronos. She didn't like the Sixth Doctor being called in to be part of her team. She fell though a portal after the a door opened. She was converted into a Cyberman. She wanted to bring the Doctor to the Cyber-Controller. She used her transponder to spy on her other humans. She used Evelyn Smythe as a bargaining chip. (WC: Real Time, AUDIO: Real Time)