Helen A

Helen A was the ruler of the human colony on Terra Alpha. Her law was enforced by the Happiness Patrol. She was overthrown by the Seventh Doctor. Her consort was Joseph C and she had a pet Stigorax, called Fifi. (DW: The Happiness Patrol)

Behind the scenes

 * Patricia Routledge was originally offered the part of Helen A, but she declined.
 * Fans generally believe that Helen A served as an allegorical representation of British Prime Minister Margaret Thatcher.