Il Decimo Dottore sfoggia un cappotto leggero lungo di di colore blu o marrone, una cravatta e scarpe da ginnastica [[Converse]]; l'aspetto dell'Unidicesimo Dottore è stato descritto come quello di un professore universitario: indossa una giacca [[Tweed (tessuto)|tweed]], un papillon e stivali neri.<ref>{{cita web|lingua=en|ur=http://news.whoviannet.co.uk/2009/07/the-eleventh-doctors-costume-unveiled/|titolo=The Eleventh Doctor’s costume unveiled!|editore=WhovianNet|data=20 luglio 2009}}</ref>
==Continuity del personaggio==
Over the years, different writers and production teams have introduced their own twists to the Doctor's character, sometimes as part of a grand creative reinvention; others, out of narrative convenience or outside pressures. Without one driving vision to maintain continuity, newer details may occasionally seem to contradict earlier ones. Other details—sometimes significant ones—are later ignored, sometimes leading to argument amongst series fans as to how, or whether, these details apply in a broader context.
In the early serials ''[[The Edge of Destruction]]'' and ''[[The Sensorites]]'', it appeared that the First Doctor had only a single heart. The novel ''[[The Man in the Velvet Mask]]'' by Daniel O'Mahony suggests that Time Lords only grow their second heart during their first regeneration (speculated earlier by [[John Peel (writer)|John Peel]] in ''[[The Gallifrey Chronicles (1991 book)|The Gallifrey Chronicles]]''). In ''[[The Mind of Evil]]'', "[[The Christmas Invasion]]" and "[[The Shakespeare Code]]" one of the Doctor's hearts temporarily stops beating due to intense trauma.
Also during his first regeneration, and for similarly unclear reasons, the Doctor's clothes (save for his cloak and ring, both of which quickly thereafter fall off) changed along with his body (''[[The Power of the Daleks]]''); on all subsequent regenerations the new Doctor generally continues to wear the clothing he regenerated in until he selects a new outfit (though the regeneration from the Fourth to the Fifth Doctors included a change of footwear, possibly due to a continuity error).
In ''[[The Brain of Morbius]]'' (produced shortly before ''[[The Deadly Assassin]]''), visual images displayed during a mental battle between the Fourth Doctor and Morbius can be taken as implying that the Doctor had at least eight incarnations prior to the First Doctor. However, multiple dialogue references throughout the series (particularly in ''[[The Three Doctors (Doctor Who)|The Three Doctors]]'', ''[[Mawdryn Undead]]'' and ''[[The Five Doctors]]'') contradict this, as well as the fact that the Doctor has regenerated six times since then (as stated in "School Reunion"). Explanations have included theories that the images were of Morbius's previous incarnations (two images that are certainly Morbius also appear, and the game seems to have a symmetrical arrangement), or false images induced by the Doctor. The ''Doctor Who'' novels have suggested that these may have been faces of the [[Other (Doctor Who)|Other]], a figure from Gallifrey's ancient past and the genetic predecessor of the Doctor (although being from the tie-in novels, the [[Whoniverse#Inclusion and continuity|canonicity]] of this character is debatable). The producers, however, intended that these were figures from the Doctor's past. Producer Philip Hinchcliffe has said, "We tried to get famous actors for the faces of the Doctor. But because no one would volunteer, we had to use backroom boys. And it is true to say that I attempted to imply that William Hartnell was not the first Doctor."<ref>Lance Parkin, ''A History of the Universe'' pg. 255</ref>
In the Sixth Doctor story arc ''[[The Trial of a Time Lord]]'', a Time Lord with the title of the [[Valeyard]] (played by [[Michael Jayston]]) was revealed to be a potential future Doctor, a "distillation" created somewhere between his twelfth and final incarnations and embodying all the evil and malevolence of the Doctor's dark side. The Valeyard was defeated in his attempt to actualise himself by stealing the Sixth Doctor's remaining regenerations, however, and so may never actually come to exist.
The idea of an "in-between" version of the Doctor has its precedents. In ''Planet of the Spiders'', a Time Lord's future self (described as a "distillation" of the future incarnation) was shown to exist as a [[tulpa|corporeal projection]] that assisted his then-current incarnation. In ''[[Logopolis]]'', an eerie and mysterious white-clad figure known as the Watcher assisted in the transition between the Fourth and Fifth Doctors. [[Nyssa (Doctor Who)|Nyssa]] commented that the Watcher "was the Doctor all the time" as he merged with the supine form of the fourth Doctor, regeneration beginning just before the merging is complete.
Perhaps the most controversial element from [[Doctor Who (1996 film)|the 1996 television movie]] was the revelation that the Doctor is half-human ("on [his] mother's side"). The spin-off novels and audios have tried various methods to explain this revelation, suggesting that the Doctor retained some human [[DNA]] from his time as Dr John Smith (in which the Doctor, using bought technology, became biologically human with a different persona unaware of his Time Lord self) in the [[Virgin New Adventures]] novel ''[[Human Nature (Doctor Who novel)|Human Nature]]'', or that his origins have become muddied by agents manipulating his personal timestream (the [[Eighth Doctor Adventures]] novel ''[[Unnatural History (Doctor Who)|Unnatural History]]''), hinting that it is only the Eighth Doctor who is half human, or that only his mother's incarnation at the time of his birth was Human. Kate Orman's novel ''[[The Room with No Doors]]'' features a time-travelling Victorian lady, Penelope Gate, who later books, such as ''Unnatural History'' and ''[[The Gallifrey Chronicles (2005 novel)|The Gallifrey Chronicles]]'', hint may be the Doctor's mother, but do not elaborate on how this came to pass. In the [[New Series Adventures (Doctor Who)|New Series Adventures]] novel ''[[The Deviant Strain]]'' by Justin Richards, the Doctor comments that his DNA is "close" to that of humans. In the [[IDW Comics]] story "The Forgotten", the Eighth Doctor remarks that he simply convinced the Master he was half-human, "with nothing more than a wide-eyed expression, a couple of words, and a half-broken [[Chameleon Arch]]." However, as noted above, the canonical nature of the novels and comics is uncertain. The idea of a "half-human" Doctor is further discredited by the 2008 series finale "[[Journey's End (Doctor Who)|Journey's End]]", wherein the Doctor expresses dismay at his "half-human" double, and explicitly states that a human/Time Lord cross such as Donna becomes in that story has never existed before; events later in the episode show the latter combination to be inherently unstable. Furthermore, it was heavily implied by Russell T. Davies that "The Woman" in ''The End of Time'' is the Doctor's mother, and she is clearly one of the Time Lords with a vote on the Council. Despite all this, the notion that the Doctor is part human could certainly explain why he has always held such a strong affinity and protective nature towards the human race.
The Time Lord ability to change species during regeneration is referenced by the Eighth Doctor in relation to the Master in the television movie, being supported by Romana's regeneration scene in the 1979 serial ''[[Destiny of the Daleks]]''. The [[Dalek]]s also implied during the events of ''[[The Daleks' Master Plan]]'' (1965–66) that the First Doctor's humanoid form is not his actual appearance. The new series has not made any allusions to mixed parentage, simply referring to the Doctor as "alien" or "Time Lord". However, the trade paperback ''Doctor Who: The Legend Continues'' by [[Justin Richards]], published to coincide with the new series, refers to the Doctor as half-human. The 2007 Tenth Doctor episodes "[[Human Nature (Doctor Who episode)|Human Nature]]" and "[[The Family of Blood]]", adapted from the above-mentioned Seventh Doctor novel, ''Human Nature'', also show the Doctor using technology to become biologically human, although he does so through Time Lord science. Later, in "[[Utopia (Doctor Who)|Utopia]]", the Master is revealed to have undergone the same process.
===Discontinuities===
While over the decades several revelations have been made about his background—that he is a Time Lord, that he is from Gallifrey, among others—the writers have often strived to retain some sense of mystery and to preserve the eternal question, "Doctor who?". This back-story was not rigidly planned from the beginning, but developed gradually (and somewhat haphazardly) over the years, the result of the work of many writers and producers.
This has led to [[Continuity (fiction)|continuity]] problems. Characters such as the [[Meddling Monk]], expressly said to be from the same planet as the Doctor, were retroactively labelled [[Time Lord]]s, early histories of races such as the [[Dalek]]s were rewritten, and so on. Series writer [[Paul Cornell]], discussing continuity errors, opines that the modern series' "[[Time War (Doctor Who)|Time War]]" can explain away (or [[retconning|retcon]]) such discontinuities, giving the example of Earth's different destructions in ''[[The Ark (Doctor Who)|The Ark]]'' (1966) and "[[The End of the World (Doctor Who)|The End of the World]]" (2005).<ref name="Cornell">{{cite web |url=http://paulcornell.blogspot.com/2007/02/canonicity-in-doctor-who.html |title=Canonicity in Doctor Who |accessdate=22 July 2008 |last=Cornell |first=Paul |authorlink=Paul Cornell |date=10 February 2007 |work=Paul Cornell's House of Awkwardness}}</ref> Writer and ''Doctor Who'' executive producer [[Steven Moffat]] has gone further, arguing that "a television series which embraces both the ideas of parallel universes and the concept of changing time can't have a continuity error—it's impossible for ''Doctor Who'' to get it wrong, because we can just say 'he changed time'".<ref>{{cite video |people=[[Steven Moffat|Moffat, Steven]] (Panelist) |date=24 July 2008 |title=Doctor Who Panel Part 5 SDCC 2008 |url=http://www.youtube.com/watch?v=JRK4XSJXtQQ&feature=related |medium= |publisher=YouTube |___location=[[Comic-Con International|San Diego Comic-Con]] 2008 |accessdate=28 July 2008 |time=6:53 |quote= }};<br/>{{cite news |title=Moffat promises new Who monsters |url=http://news.bbc.co.uk/1/hi/entertainment/7531310.stm |publisher=BBC News |date=29 July 2008 |accessdate=29 July 2008 }}</ref>
Some of the stories during the Seventh Doctor's tenure, part of the so-called "[[Cartmel Masterplan]]", were intended to deal with this issue by suggesting that much of what was believed about the Doctor was wrong and that he was a far more powerful and mysterious figure than previously thought. In both an untelevised scene in ''[[Remembrance of the Daleks]]'' and the subsequent ''[[Silver Nemesis]]'' it was implied that the Doctor was "more than just another Time Lord". The suspension of the series in 1989 means that none of these hints were ever resolved. The "Masterplan" was used as a guide for the [[Virgin New Adventures]] series of novels featuring the Seventh Doctor, and the revelations about the Doctor's origins were written into the novel ''[[Lungbarrow]]'' by [[Marc Platt]]. However, the [[Whoniverse#Inclusion and continuity|canonicity]] of these novels, like all [[Doctor Who spin-offs]], is open to interpretation.
==Relazioni sentimentali==
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