Board Thread:The Panopticon/@comment-1827503-20141102022000/@comment-3106235-20141102175545

Well the BBC has confirmed her to be the Master, per this link (http://www.bbc.co.uk/programmes/profiles/xCgpqKWg8nj5BS2LJ6DRV0/missy). I don't think they would go to the trouble of doing that if Steven Moffat was writing a deception.