The actor and comedian will appear in the opening episode of series 10, which starts filming next week in Cardiff (Monday 20 June), and looks set to return through out the run.
For most fans, the casting of Peter Capaldi as The Doctor crowned what was a glorious anniversary year for the BBC's long-running SciFi series.
Pearl Mackie will star alongside Peter Capaldi in both the Christmas special and next year’s full series which will be the final run overseen by Executive Producer Steven Moffat.
Doctor Who fans will need to wait until Christmas before their hero returns to screens after the BBC shelved plans for a new series this year.
The show will be set in Coal Hill School, the school attended by the Doctor’s granddaughter in the show’s original 1963 episodes and more recently the workplace of companion Clara Oswald.