David Tennant is back in the new teaser for the future of Doctor Who
How is David Tennant back on Doctor Who? Why is he back? WHEN is he back? (Next year.)


King Charles III in 2017 Photo: Arthur Edwards – Pool/Getty Images
[The following contains spoilers for Doctor Who.]
Jodie Whittaker’s final episode of Doctor Who aired today, and as is tradition when the lead actor leaves the show, her episode ended with her regenerating into a new Doctor… but there’s a but, and we’ll get to it in a bit. First, after the episode aired, the BBC released a teaser video for next year’s run of Doctor Who specials, featuring previously announced returning stars David Tennant (the 10th Doctor) and Catherine Tate (Donna Noble, whose return to the series has all sorts of curious lore implications). We also see Neil Patrick Harris as a scary looking man in a tuxedo and Sex Education star Ncuti Gatwa as the new Doctor himself.