https://www.radiotimes.com/news/tv/2020-01-26/doctor-who-first-black-doctor/

British Jo Martin played a previously unseen regeneration of the Time Lord on Sunday's episode. But does that make Jodie Whittaker technically the second female Doctor?

How Doctor Who pulled off a big surprise in Sunday's episode (https://tv.avclub.com/we-talked-to-the-doctor-who-star-who-pulled-off-a-surpr-1841242370)

Showrunner Chris Chibnall and his team kept this week's shocker "very, very hush-hush" with the help of people carrying black umbrellas.