Speaking of Ncuti’s departure, Russell T Davies, Showrunner said: "What a Doctor! Thank you, Ncuti! As his final words say, this has been an absolute joy, and the team in Cardiff and everyone who has worked on this show for the past few years, are so lucky to have been part of Ncuti’s great adventure as he shoots off to stratospheric new heights."

Ncuti Gatwa's shock regeneration is followed by an even bigger surprise as the show welcomes back a popular star of TARDIS past. BEWARE! Spoilers ahead!

Ncuti Gatwa, the first Black actor to play the lead role in British sci-fi show "Doctor Who", departed the series on Saturday in a season finale that saw familiar face Billie Piper reappear in his place.