Romola Garai could still be the next Doctor.

TV The Bookseller announces that Romola is to star in an adaptation of some book I've never heard of, let alone read:

"Romola Garai is starring in the BBC adaptation of Jessie Burton’s “genre-bending” debut The Miniaturist.

"Filming has begun and is taking place in both Holland and the UK, for broadcast later this year.

[...]

"Garai (previously seen in "The Hour" and "Atonement") will play Marin, the “cold” sister of wealthy merchant, Johannes Brandt. She said: “I'm so happy to be part of this superb adaptation of Jessie Burton's exquisite, genre bending novel The Miniaturist. Marin is a character with an extraordinary journey of true complexity and depth. I am also truly honoured to be working alongside such an extraordinary cast and creative team on bringing this moving and iconic story to life.”

So there's still plenty of time for her to film the regeneration scene for the Christmas episode.  Oh and the synopsis suggests this thing has a massive twist in there.  Alternate reality?  Holodeck?  Dream?