Lynn Pickering

 was a student at St Matilda's College. She saw the three mysterious nuns at a choir practice. She later saw her in her dormitory. Megan Matthews said she had been researching the college. She was placed into a alien spaceship as a pilot but the Fourth Doctor managed to remove her. Megan later tried to coerce Lynn back into the machine. The Doctor managed to get her out of the machine before it the ship exploded. (AUDIO: The Cloisters of Terror)