Quote Originally Posted by ChrisIII View Post
So some of the advertisements for Sunday's episode say it'll be another 'shocking twist" episode similar to the Master reveal at the beginning of this season. Given that we're at the halfway point this season I'm guessing it's another addition to the "Timeless child" arc.

There was a quick glimpse of a young woman maybe she is The Rani although that idea is spoilt now because of the strong performance of Missy.