https://www.cbr.com/doctor-who-christmas-special-new-science/

Doctor Who's Christmas special ushers in a fantastical new era, blurring the lines between science and magic with a band of time-twisting goblins.

Is Doctor Who's 'The Church on Ruby Road' Setting up a Major Timeline Mystery? (https://www.cbr.com/doctor-who-the-church-on-ruby-road-time-mystery/)

"The Church on Ruby Road" continues a pattern from the Doctor Who 60th anniversary specials of time being altered, hinting at an emerging mystery.