Yes, I know - it’s absolutely earth shatteringly awful news!
Peter Capaldi began as the Doctor proper in 2014, yet thanks to 2016’s wasted gap-year, this will be only his third, and now last, season in the role.
Was he pushed to make way for a younger, prettier replacement? Possibly. I’m sure we’ll know all in the years to come… For now, all we know is, Christmas will be his last episode, and I’m darned upset about it.