The Twelfth Doctor is an incarnation of the Doctor, the protagonist of the British science fiction television series Doctor Who. He is portrayed by Scottish actor Peter Capaldi in three series as well as four specials. As with previous incarnations of the Doctor, the character has also appeared in other Doctor Who spin-offs, both during and after the character's televised appearances.
The Doctor is an extraterrestrial being from a humanoid species known as Time Lords from the planet Gallifrey. The Doctor travels through space and time using a time travelling spaceship called the TARDIS and frequently travels with companions. When a Time Lord is fatally injured or weakened by old age, their cells regenerate into a new body, while they retain their memories, their personality changes. The different portrayals of the Doctor function as distinct stages within a single, continuous narrative. Capaldi's portrayal of the Doctor is initially a spiky, brusque, contemplative, and pragmatic character who conceals his emotions in the course of making tough and sometimes ruthless decisions. Very quickly, however, he becomes extremely humanitarian and compassionate, and more openly showcases his selflessness. Preceded in regeneration by the Eleventh Doctor, he is followed by the Thirteenth Doctor.
This incarnation's companions include school teacher Clara Oswald, who also travelled with his previous incarnation, for his first two series; and for his final series, university canteen assistant Bill Potts and humanoid cyborg Nardole. He also made a guest appearance in the Doctor Who spin-off series Class, appearing in the show's first episode.
Contents
Development
Casting
Matt Smith, who played the Eleventh Doctor, publicly announced his departure from Doctor Who on 1 June 2013, triggering extensive media speculation on the subject of his successor. On 3 August 2013, bookmakers William Hill suspended betting when Capaldi became the five to six favourite to be cast. Capaldi's casting was revealed on 4 August during a live broadcast on BBC One, titled Doctor Who Live: The Next Doctor. The live show, hosted by Zoe Ball, was watched by an average of 6.27 million in the UK, and was also simulcast in the United States, Canada and Australia.
While Capaldi was the first choice for the role, other actors were also approached in case Capaldi turned the offer down. Ben Daniels, who was an early favourite following the announcement of Matt Smith's departure, said that he had been approached with a view to assessing whether he would be interested in playing the Doctor, with his name remaining as a potential contender until just before the live BBC broadcast.
Doctor Who head writer and executive producer Steven Moffat said that Capaldi "briefly flicked through [his] mind" while casting the Eleventh Doctor, but that he dismissed the idea, thinking he was not right for the part at the time. Ben Stephenson, the BBC's drama commissioner, said that Capaldi was suggested months before the August revelation and that a secret audition was held at Moffat's home. Capaldi prepared for the audition by downloading old Doctor Who scripts from the Internet and practising in front of a mirror. He discovered he had been given the part during filming for Adrian Hodges' The Musketeers in Prague; after missing a call from his agent, Capaldi rang back to be greeted with "Hello, Doctor!" At 55 years old when originally cast, Capaldi was only a few months younger than William Hartnell (the First Doctor) was when he was cast in the role, making Capaldi the oldest actor since Hartnell to star as the Doctor and the third oldest to portray the character. Moffat felt that an older actor would work best following the youngest actor, as it would both provide a change and lessen comparisons. He commented, "I can absolutely believe that the strange old-young Matt Smith will turn into the strange young-old Peter Capaldi."
Capaldi had previously appeared playing other roles in the Doctor Who franchise. He portrayed Lobus Caecilius in the 2008 episode "The Fires of Pompeii" and John Frobisher in Children of Earth, the 2009 serial of the Doctor Who spin-off Torchwood. Moffat has stated that he plans on explaining over time why there are three characters in the Doctor Who universe with the same appearance; his predecessor Russell T Davies had once explained to him a theory for the first two, and upon Capaldi's casting assured Moffat that the explanation would still work. This situation was alluded to in "Deep Breath", when a confused Doctor is reminded of Caecilius when he examines his face in a mirror. In "The Girl Who Died", it is explained that the Doctor chose Caecilius' face to remind himself that he is the Doctor, and that he can always save people. While not explained in the episode, Moffat later said that he also shares a face with John Frobisher as Frobisher is Caecilius's descendant, and represents the end of Caecilius's bloodline, referencing the Doctor's "eternal battle with doom and destiny." Capaldi's casting marks the second time an actor has previously appeared in the series and then been cast as an incarnation of the Doctor, the first being Colin Baker.
Departure
On 30 January 2017, Capaldi confirmed that the tenth series would be his last; Moffat had announced earlier in January 2016 that he was handing over his position as showrunner to Chris Chibnall following the tenth series' broadcast in 2017. Regarding his decision to leave, Capaldi stated that despite his tremendous love for the show, he was unsure if he would be able to deliver at his best performance if he remained in the role for too long.
Character
Costume
The Twelfth Doctor's general outfit consists of a navy blue Crombie coat with a crimson lining, dark blue trousers, a long collared white shirt buttoned to the top, a black cardigan or waistcoat, and brogue boots. His shirt varies from episode to episode, with a navy shirt, a dark purple shirt and a black shirt with white polka dots appearing, as well as a black holey jumper, all being worn under his coat in his first series. He also wears a hoodie over his jumper as of series nine, over his T-shirt, all being worn under his coat. In "Time Heist", the Doctor describes his costume as "hoping for minimalism, but I think I came up with magician."
The look was created by Doctor Who costume designer Howard Burden. His design was described as "No frills, no scarfs, no messing, just 100% rebel Time Lord." Capaldi said that the costume took a long time to find. The reason he settled on his final costume was that, "I think it's quite a hard look. I always wanted him to be in black – I always just saw the Doctor in dark colours. Not tweed," in reference to his immediate predecessor's original costume. "Matt's a really young cool guy – he can wear anything, but I wanted to strip it back and be very stark." Moffat described the look as "A stick-insect sort of thing". He also said that Clara calls him "a grey-haired stick-insect at one point". Capaldi also stated that he chose the Twelfth Doctor's costume so fans of the show who enjoy cosplay could easily emulate it without going to great expense. Writing for Radio Times, fashion columnist Anna Fielding described it as "a classic early skinhead look" and linked it to Capaldi's history as a punk musician.
Capaldi's costume has varied in some episodes. In "Mummy on the Orient Express" he dons a period-appropriate tuxedo and a black cravat. In "The Magician's Apprentice", he wears Ray-Ban sunglasses (later revealed in "The Witch's Familiar" to be a wearable version of his sonic screwdriver), a T-shirt and plaid baggy trousers along with the hoodie and Crombie coat. In "Face the Raven", the Twelfth Doctor sports a crimson velvet variant of his Crombie coat. After briefly ditching it in "Hell Bent", Clara comments that it made him look more 'doctory'. At the end of the episode, he dons the crimson coat in honour of her and is given a new Sonic Screwdriver by the TARDIS. In the ending segment of "The Husbands of River Song", the Doctor again dons the same tuxedo and period dress worn in "Mummy on the Orient Express". In Capaldi's final season, the most variations were seen on the Doctor's costume. In the first episode of the season, Capaldi donned a new black velvet frock coat with blue lining and peak lapels. This coat appeared several times throughout the season. The navy crombie coat returned ("Oxygen") as well as the red velvet crombie. Another addition to the Doctor's wardrobe occurs mid-season with the introduction of a grey distressed linen frock coat. The final look that Capaldi had for his tenure as the Doctor was a navy velvet coat with red lining.
Characterisation
The Twelfth Doctor is, according to Capaldi, "more alien than he's been in a while." Whilst still defining himself as someone who "saves people," the Twelfth Doctor cares little about being seen as a hero or even being liked by the people who he is trying to save. Unlike his previous two incarnations who cared about humans and tried to understand them, Capaldi has confirmed that, this incarnation "doesn't quite understand human beings or really care very much about their approval." Clara is put on the back-foot by him post-regeneration initially not seeing through his 'Tough Exterior'. Jenna Coleman says of this Doctor, "He's more removed, you can't quite access him in the same way", in comparison to his more friendly and accessible predecessor.
Initially, it was reported that Capaldi specifically requested that the Doctor would not flirt with his companion the way his previous incarnation did, but the actor stated that he said no such thing and that it was inflated by the media. Steven Moffat has teased that Capaldi's Doctor may perhaps be more in love with Clara than he'd like to believe. He has also been described as a "total adrenaline junkie" and, according to Moffat, "much fiercer, madder [and] less reliable". "He's not as immediately approachable and he's not necessarily looking for your approval, when he says 'Wait here, I'll be back', you're not absolutely convinced... what he's not doing is reassuring you very much." Moffat also described the Twelfth Doctor as having attention deficit disorder; this was also implied by the character himself in the theatrical short "The Doctor's Meditation" in which he states that Clara believes he has the condition.
Mark Gatiss said that Capaldi's Doctor was "sort of Tom Baker, Jon Pertwee and even Christopher Eccleston style...it's someone who's not immediately going to be your best friend and can be quite abrupt and rude." Moffat added to this analysis of the character by saying, "He has a tremendous ability with throwaway humour and a lot of it is around the fact that sometimes he is terribly rude. I think kids will think he is the rude Doctor [...] You might want to cuddle him but he really will resist." Capaldi stated that part of the Doctor's personality would share "a certain acid wit" of Malcolm Tucker, "specifically the attitude, the wisecracks and the energy...he can be edgy, volatile and dangerous". Capaldi has stated that all of the previous actors who had played the Doctor were channelled in his portrayal and that his particular influences were Hartnell, Pertwee and Peter Davison.
Appearances
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).
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
Peter Capaldi has received critical acclaim for his portrayal of the Doctor. Following the broadcast of "Deep Breath", Euan Ferguson of The Guardian called his performance "wise and thoughtful", while Michael Hogan of The Telegraph felt that Capaldi's portrayal "crackled with fierce intelligence and nervous energy". Capaldi's performance in "Listen" was praised with Alasdair Wilkins of The A.V. Club, stating "Capaldi turns in a suitably fearless performance, reaching his obsessive crescendo as he prepares to meet whatever is waiting for him at the end of the universe". His acting in "The Caretaker" was praised by Morgan Jeffery of Digital Spy, noting "Capaldi's is the most complex and variable take on the Time Lord we've seen since Eccleston".
In January 2015, Capaldi became the first actor to portray the Doctor not be shortlisted for a National Television Award since the series revival in 2005. Ahead of the British Academy Television Awards that year, Paul Flynn of The Telegraph noted that Capaldi's portrayal of the Doctor had the effect of "significantly reducing Doctor Who's glamour quotient". Later, Capaldi received a TV Choice Awards nomination for Best Actor. He was also nominated for a BAFTA Cymru Award in the Best Actor category for his acting in "Dark Water". Steven Moffat praised his leading man, stating "we could argue for the rest of our lives about who's the best Doctor — but for me, the best single performance in the role is settled forever. You can only ask a solo of a virtuoso, so thank God and Scotland for Peter Capaldi". Capaldi's predecessor, Matt Smith, applauded him as having "reinvented" Doctor Who. Colin Baker praised the 12th Doctor noting "[Capaldi's Doctor] is grumpy and curmudgeonly and intolerant, and gosh – I should be playing it now [...] I love his style, and I love his character". In a later interview, Baker expressed that Capaldi initially had "a rough deal" as fans weren't very kind towards his incarnation, as they had been conditioned towards "eye candy" in the form of "dashing role model[s]" popularised by David Tennant.
Den of Geek' Simon Brew lauded Capaldi in "Before the Flood" noting "his performance continues to mix grumpiness, friendliness, intelligence and a large dose of alien". Catherine Gee of The Telegraph credited Capaldi's acting in "The Woman Who Lived" noting "he has grown into the role utterly and completely. He embodies the weight of the Doctor's responsibility". His performance in "The Zygon Inversion" was heavily praised by with Dan Martin of The Guardian, stating "this Doctor has never been written better, Capaldi has never channelled Tom Baker more". Most prominently Capaldi's performance in "Heaven Sent" received universal acclaim, with Patrick Mulkern of Radio Times noting that "Peter Capaldi's one-man show is an instant classic". Jeffery of Digital Spy praised the final moments between the Doctor and River Song in "The Husbands of River Song", writing "combined with Capaldi and Kingston's sensitive work [...] you feel a weight of history between these two people who've never shared a screen before". In June 2016, Peter Capaldi was shortlisted for a national TV Choice Award for Best Actor. He had also been submitted for a Primetime Emmy Award nomination for Outstanding Lead Actor in a Drama Series. In addition, Capaldi was announced as a BAFTA Scotland Awards nomination as Best Actor on Television.