Television The Twelfth Doctor makes a first, uncredited appearance in the programme's fiftieth anniversary special, "
The Day of the Doctor" (2013), when thirteen incarnations of the Doctor unite to save his home planet of Gallifrey from destruction during the
Time War. At first,
Time Lords in Gallifrey's war room spot twelve blue TARDISes approaching and encircling the planet. This count is then corrected to thirteen by Androgar, and Capaldi's hands, eyes, and forehead are fleetingly shown (his eyebrows which feature prominently in the cameo appearance would subsequently be part of a
running gag, dubbed the "attack eyebrows"). He then makes his full debut at the end of the next episode, "
The Time of the Doctor", after the Eleventh Doctor (Matt Smith), about to die from old age, is given a new regeneration cycle from the Time Lords, who remain hidden in a
pocket universe. In the
series 8 premiere "Deep Breath" (2014), the Doctor arrives in Victorian London, where he recovers from the stress of his regeneration, initially under the care of the
Paternoster Gang. After uncovering a potential alien presence in London, the Doctor goes on the run as a homeless person for some time. While on the run, he believes he has seen his new face before, though does not recall from where. He and Clara Oswald are reunited by a third party, and realise that this third party has been conspiring to bring the two of them together for some time. The Doctor helps Clara overcome her reservations about his new personality and older physical appearance, and they begin travelling together once more. Over the course of the series, he and Clara have some ups and downs in their friendship caused both by the Doctor's callousness and because Clara wishes to keep her continued travelling a secret from her boyfriend,
Danny Pink (
Samuel Anderson); she is not able to resolve the situation before Danny dies in a road accident in the first part of the series finale, "
Dark Water"/"
Death in Heaven". In the finale, he meets Missy (
Michelle Gomez), the latest incarnation of his nemesis,
the Master, who reveals that she conspired to bring him and Clara together and has begun converting the Earth's dead into
Cybermen; her plan is to compromise the Doctor's morality with the offer of an army with which to rule the universe. Missy's scheme is foiled, but not before many have died, and Earth is in chaos. The Doctor takes a weapon from Clara to spare his companion the burden of killing Missy herself. As the Doctor hesitates, a cyberconverted
Brigadier Lethbridge-Stewart, retaining his humanity, appears to disintegrate Missy with a laser blast. After a traumatic ordeal, the Doctor and Clara part ways after lying to each other about their current situations, seemingly for good, before they are reunited by a shared dream in "
Last Christmas" and agree to continue adventuring with the intervention of
Santa Claus (
Nick Frost). In the
series 9 premiere "
The Magician's Apprentice"/"
The Witch's Familiar" (2015), the Doctor, along with Clara and Missy, who survived her apparent disintegration, are summoned to the planet
Skaro by The Doctor's nemesis
Davros (
Julian Bleach), the creator of the evil
Dalek race, who is dying. Davros plays on the Doctor's sympathies to trick him into revitalising a dying Dalek empire, siphoning some of the Doctor's
regeneration energy to do so. The Doctor also enlivens a mass of dying Daleks consigned to the sewers of Skaro, who begin to tear the city apart, and he makes his escape with Clara, but not before visiting Davros as a young boy on the battlefields of Skaro, and instilling in him a lesson about the virtues of mercy. In "
The Girl Who Died," the Doctor finally remembers that he shares a face with a man
he was persuaded to save in Pompeii, despite his initial reluctance to alter the timeline. He surmises that he subconsciously chose this face as a reminder that his job is to save lives. He is inspired to resurrect Viking girl
Ashildr (
Maisie Williams) with alien technology; he learns in "
The Woman Who Lived" that she has become immortal and watches over his past companions. In "
Face the Raven", Clara dies while trying to outsmart Ashildr, who stages an elaborate ploy to trap the Doctor, which he learns in "
Heaven Sent" was on behalf of the Time Lords. Emerging from the trap on his home planet of Gallifrey, he sends a warning to the people of his return. In "
Hell Bent", the Doctor deposes Time Lord President
Rassilon (
Donald Sumpter) and uses Time Lord technology to save Clara from the moments before her death, and then proceeds to run away with her to the end of time in the hopes of cheating death permanently. He is then persuaded by Ashildr that he and Clara are a dangerous influence on each other, and perhaps together constitute the "Hybrid of two great warrior races" which is prophesied to destroy Gallifrey. The Doctor attempts to wipe Clara's memories of him using a device, but she alters it so that it affects his memories of her instead; she leaves him behind on Earth with his TARDIS to start adventuring again. She departs in her own stolen TARDIS, alongside Ashildr, promising to one day return to Gallifrey and accept her death. The
Christmas special "
The Husbands of River Song" (2015) is the Twelfth Doctor's first appearance alongside his roguish time-travelling wife
River Song (
Alex Kingston). After an emotionally wrought adventure, the Doctor and River finally confess the full extent of their feelings for each another, and he ends up fulfilling the history River told his earlier incarnation in "
Silence in the Library" (2008): giving her his
sonic screwdriver and spending a 24-year long date together as their final encounter. The Doctor next appears in the first episode of
Doctor Who spin-off
Class, appointing two alien refugees and a group of teenagers to protect the pupils and faculty of
Coal Hill Academy from alien threats. He returns in 2016 Christmas special "
The Return of Doctor Mysterio", alongside new companion (and the first full-time alien companion of the revived series) Nardole, an employee of River Song's introduced in the previous episode. Together, they save New York from being destroyed by aliens with ambitions of world domination. In the
series 10 premiere "
The Pilot" (2017), it was revealed that the Doctor has spent decades working as a professor in St Luke's University in
Bristol, giving lectures on time and life, assisted by Nardole. The Doctor has taken an oath to stay on Earth and guard a mysterious vault beneath the university. Bored after decades of confinement on Earth, he takes on Bill Potts as his new companion, despite Nardole's reminders about his oath. In "
Extremis", the show reveals that Nardole came to assist the Doctor on orders given by River before she died, and that the mysterious vault contains Missy, whom the Doctor swore to watch over for a thousand years. Over "
The Lie of the Land", "
Empress of Mars" and "
The Eaters of Light", the Doctor becomes more convinced that Missy has reformed her ways, and so in "
World Enough and Time", he sends her to react to a distress call on a colony ship trapped in the gravity of a
black hole. His plan goes horribly wrong when Bill is shot and converted into a Cyberman by medics in the lower floors of the ship, where, due to
time dilation, many years go by. In the series finale, "
The Doctor Falls", the Doctor faces an army of Cybermen and struggles to convince Missy to side with him; she is influenced by her past incarnation (
John Simm), also on board the ship. Badly injured by the Cybermen's attacks, the Doctor sends Nardole away to evacuate humans from the ship before destroying an entire level of it. Appearing to have died, he is taken to the TARDIS by Bill, who has been restored to life by the timely intervention of her love interest, Heather (
Stephanie Hyam). The Doctor wakes up alone and vows not to regenerate. Clinging onto his life, he wanders out of his TARDIS and encounters his
first incarnation (
David Bradley), who is facing similar reservations about his
pending regeneration. In the Christmas special "
Twice Upon A Time", the two Doctors reflect on their lives and, after witnessing the
Christmas armistice of 1914, both decide to move on to their next forms. Alone in his TARDIS, the Twelfth Doctor speaks words of advice directed to his successor before regenerating into the Thirteenth Doctor.
Literature New Series Adventures released novels starring the Twelfth Doctor and Clara Oswald in September 2014:
Silhouette,
The Crawling Terror, and
The Blood Cell. The next wave was released in September 2015, with the stories of
Deep Time,
Royal Blood and
Big Bang Generation; the first two of these also feature the Twelfth Doctor and Clara, while
Big Bang Generation sees the Twelfth Doctor reunited with the
Seventh Doctor's
Virgin New Adventures companion
Bernice Summerfield. In April 2017, three new novels were released, featuring new companions Nardole and Bill Potts. They are titled
The Shining Man,
Diamond Dogs and
Plague City.
Audio In February 2019, the Twelfth Doctor made his first
Big Finish appearance in
The Astrea Conspiracy, narrated by
Neve McIntosh. The Twelfth Doctor has since appeared in more
Short Trips stories and the anthology series
The Twelfth Doctor Chronicles narrated by
Jacob Dudman. In 2025, following Dudman's departure and the end of
The Twelfth Doctor Chronicles, voice actor and impressionist
Jon Culshaw played the Twelfth Doctor in ''Merlin's Trap'' - a story in Big Finish's anthology Halloween special. In December, Big Finish announced that Culshaw would reprise the role for
The Twelfth Doctor Adventures, a new series due for release in July 2026.
Video games Capaldi voices the
Lego counterpart of the Twelfth Doctor in the video game,
Lego Dimensions, alongside Jenna Coleman and Michelle Gomez as Clara and Missy, respectively. He was also given his own level called “The Dalek Extermination of Earth”, where the Doctor uses the TARDIS to time travel to Central London in the year 2025, where the Daleks have taken over the world and the Doctor has to alter fate with the power of time travel. He also lent his voice to the character in the
CBBC online game,
The Doctor and the Dalek and in the
Doctor Who Game Maker on the official
Doctor Who site. ==Reception==