Walter Vincent

 was the Grand Administrator of Earth. The Eighth Doctor and Narvin initially thought he was, he was in fact a construct, created from Molly O'Sullivan's memory of her father Patrick O'Sullivan. He got everyone to obey the Master. He called Molly "Molly Dark Eyes". The Doctor transmitted the Retro-genitor particle through him to destroy The Eminence. (AUDIO: Rules of the Eminence)