Cate Reeney

 watched over the city. She tracked the anomalies in the city. She tightened up the security of the city. She thought that Hex murdered the artist Luke Moray. She later arrested for the Seventh Doctor as she thought that the Doctor had murdered the occupants. She thought the Doctor was a fifth colonist or a spy, as he had visited Glasst City many times illegally. (AUDIO: Nocturne)