So, now that we all know who Missy really was *whisper* she was the Master *whisper* we can all calm down and accept that he’s now a she. Yes? Yes.
Well, Who showrunner Steven Moffat has said that, while she was always the Master, he did want everyone to think she was going to be one of the Doctor’s other Time Lord/Time Lady adversaries… the Rani.
“I actually had her say she was a Random Access Neural Interface… the Rani!”
The Rani was played by Kate O’Mara (above with Michelle Gomez’s Missy) and faced off against seventh and eighth Doctors: “We thought ‘everyone’s bound to overhear that’. Deaf bunch of b@#tards,” he laughs – because no-one picked up on that; but, in fairness, she said it about five minutes before her identity was really revealed.
“When we did Day of the Doctor, we went to the trouble of having John Hurt’s character referred to as Omega throughout!”
“Is nobody stealing scripts these days? What’s the matter with people?”
It’s interesting that no-one has picked up on that… remember the whole Professor Yana/ you are no alone thing? No? Ok, then…
Source: Radio Times