===I Compagni del Dottore===
Tradizionalmente, il Dottore viaggia e condivide le sue avventure con uno o più compagni di viaggio. Nella serie classica, tali comprimari prendevano generalmente il nome di amici o assistenti; a partire dal [[2005]] viene invece utilizzata la dicitura «compagni» («''companions''» in originale) anche nei dialoghi.
Although the term "companion" is designated to specific characters by the show's producers, and appears in the BBC's promotional material and off-screen fictional terminology, there is no formal definition that constitutes such a designation. Stephen Brook in ''[[The Guardian]]'' newspaper's Organgrinder blog discounted Michelle Ryan as a likely next companion but said that "what consitutes a Doctor Who companion is no longer clear"<ref name="whois" /> The definition of who is and is not a companion becomes less clear in the newer series.<ref name="whois" /> During the Doctor's three latest incarnations, his primary companions ([[Rose Tyler]], [[Martha Jones]], [[Donna Noble]], and currently [[Amy Pond]]) have fulfilled a distinct dramatic role, more significant than other, less-prominent TARDIS travellers such as Adam, Jack, and Mickey. The British press referred to Martha as the "first ethnic minority companion in the 43-year television history of ''Doctor Who''"<ref>{{cite news| url=http://entertainment.timesonline.co.uk/article/0,,23569-2256654.html | title=Sidekick whose time has come | author=Adam Sherwin |work=The Times |___location=UK | date=5 July 2006 | accessdate=1 June 2010 }}</ref> and the "first [[Black people|black]] assistant",<ref>{{cite news | url=http://www.dailymail.co.uk/pages/live/articles/showbiz/showbiznews.html?in_article_id=394073&in_page_id=1773 | title=Doctor Who gets first black assistant | author=Richard Simpson |work=Daily Mail |___location=UK | date=5 July 2006 | accessdate=1 June 2010}}</ref> despite the presence of Mickey Smith in the previous season—including several episodes in which he travelled in the TARDIS with the Doctor.
La maggior parte dei compagni del Dottore sono di specie umana; nella serie classica, tuttavia, il personaggio venne affiancato anche da alcuni personaggi alieni (Kamelion, Nyssa, Adric, Turlough e Astrid), altri della sua stessa specie (sua nipote Susan e Romana) e dal robot canino K-9.
The Brigadier was included as a companion in the ''Making of Doctor Who'', published in the 1970s.<ref>Dicks, Terrance and Hulke Malcom, ''The Making of Doctor Who'' Target 0426116151</ref>
La giornalista Sarah Jane Smith (interpretata da Elisabeth Sladen) è una dei più prominenti compagni del Dottore, in quanto protagonista dello spin-off ''[[Le avventure di Sarah Jane]]''.
The opening credits do little to clarify the situation. In the first two series of the renewed programme, the only supporting actor to receive a title credit is [[Billie Piper]]. In subsequent series, [[Freema Agyeman]] and [[Catherine Tate]] are credited in all episodes in which they appear. In the third series [[John Barrowman]] receives a title credit for his return to the show. Series Four gave Agyeman, Piper, Barrowman, and [[Elisabeth Sladen]] title billing for each of their reappearances. [[Noel Clarke]] reprised his role in the Series Four finale; although listed as a companion alongside the other actors on the BBC Doctor Who website,<ref>{{cite web | title=BBC Doctor Who Series 4 Characters | url=http://www.bbc.co.uk/doctorwho/s4/characters | accessdate=1 June 2010}}</ref> Clarke is not credited in this way. In ''[[The End of Time]]'' [[John Simm]] receives title billing for his antagonist role as the [[Master (Doctor Who)|Master]], ahead of [[Bernard Cribbins]] as companion [[Wilfred Mott]].
Nell'episodio pilota della nuova serie, il Nono Dottore prende con sé una commessa londinese di nome Rose; Marth Jones è invece la prima compagna di colore (escludendo comprimari minori come Mickey Smith). Nella quarta stagione, il Decimo Dottore è invece accompagnato da Donna Noble, apparsa precedentemente in uno speciale di Natale. Il capitano Jack Harkness ([[John Barrowman]]) appare in alcuni episodi della prima e terza stagione, per poi diventare personaggio protagonista dello spin-off a lui dedicato, ''[[Torchwood]]''.
Companions in the new series also have a more flexible tenure than their classical predecessors. Several companion characters have returned to the series after leaving the Doctor's company, most notably in the Series Four finale "[[The Stolen Earth]]" / "[[Journey's End (Doctor Who)|Journey's End]]", which features the return of Rose, Martha, Jack, Sarah Jane and Mickey. This tendency, plus the increase in "one-off" companions like Astrid Peth and Jackson Lake, has further obscured the matter of who is and is not a companion, and when.<ref name="whois">{{cite news |first=Stephen |last=Brook |title=Michelle Ryan guest stars in Doctor Who. But would she make a good companion? |url=http://www.guardian.co.uk/media/organgrinder/2009/jan/23/doctorwho-bbc |work=The Guardian |___location=UK |date=23 January 2009 |accessdate=1 June 2010 |quote=A minor factor in the continual swirl around Doctor Who is that what constitutes a Doctor Who companion is no longer clear. Sure, Rose, Martha and Donna were all companions. So was Captain Jack. But what about Mickey and Jackie? How do you qualify? Name in the opening credits, regular trips in the Tardis? The doctor kisses you? I'm no longer sure. Modern TV drama is so difficult.}}</ref>
A partire dalla quinta stagione, l'Undicesimo Dottore viaggia insieme a [[Amy Pond]], il suo fidanzato [[Rory Williams]] e saltuariamente anche con l'enigmatica [[River Song]].
==Il nome==
|