It sounds like Jodie Whittaker has filmed her regeneration
The main block of filming on this year’s Doctor Who Christmas special was completed early in July, with just the small matter of shooting the entrance for the 13th Doctor left undone. The identity of the new Doctor wasn’t widely known at that point, but Jodie Whittaker was, of course, announced as Peter Capaldi’s successor last weekend.
The Doctor Who team is currently at San Diego Comic-Con, and Steven Moffat has been chatting to Empire. And in the midst of his natter, he’s confirmed that “we’ve finished shooting it”, adding that the Christmas special’s filming was completed “really, really recently … just the other day. We’re now editing. It’s still a work in progress”.
That suggests strongly that Whittaker filmed her first Doctor Who scene (outside of the announcement teaser) at some point in the last few days. Director Rachel Talalay would have shot the scene, but she was giving no fresh clues on her Twitter account.
Maybe, though, we’ll get some formal confirmation with the official Doctor Who panel, that’s taking place at Comic-Con later today.