https://www.radiotimes.com/news/tv/2020-04-07/steven-moffat-doctor-who-story/

Previous Doctor Who showrunner Moffat has penned a new story for the sci-fi character, titled "The Terror of the Umpty Ums." (https://www.bbc.co.uk/blogs/doctorwho/entries/a094ba61-81b2-465b-9b87-2f509fe2a117)