https://screenrant.com/ruby-sunday-millie-gibson-doctor-who-exit-season-14-problems/

Millie Gibson's Ruby Sunday will reportedly leave Doctor Who after 1 season, and this creates a trio of major problems for the forthcoming season 14.

Doctor Who Set Photo & Video Shows Ncuti Gatwa On The Run With Millie Gibson's Replacement Companion (https://screenrant.com/doctor-who-season-15-companion-replacement-ncuti-gatwa-set-photo/)

Brand new set photos and video from Doctor Who reveal Fifteenth Doctor Ncuti Gatwa adventuring with his newly-announced season 15 companion.