Selvom idéen om at caste en kvinde som Doktoren var blevet foreslået af showets forfattere gentagende gange, inklusiv af Newman i 1986 og Davies i 2008, blev alle officielle versioner indtil 2017, spillet af mænd.<ref>{{cite news|title=How Doctor Who nearly became the Time Lady|url=https://www.telegraph.co.uk/culture/tvandradio/doctor-who/8052694/How-Doctor-Who-nearly-became-the-Time-Lady.html|date=10. oktober 2010|first=Marc|last=Horn|access-date=17. juli 2017|newspaper=Daily Telegraph|archive-date=19. juli 2017|archive-url=https://web.archive.org/web/20170719002341/http://www.telegraph.co.uk/culture/tvandradio/doctor-who/8052694/How-Doctor-Who-nearly-became-the-Time-Lady.html|url-status=live}}</ref><ref>{{cite news|title=Could Catherine Zeta-Jones be the next Doctor Who|url=https://www.theguardian.com/media/2008/dec/18/could-catherine-zeta-jones-be-next-doctor-who|date=18. december 2008|first=Sam|last=Nichols|access-date=17. juli 2017|newspaper=The Guardian|archive-date=15. juni 2017|archive-url=https://web.archive.org/web/20170615061049/https://www.theguardian.com/media/2008/dec/18/could-catherine-zeta-jones-be-next-doctor-who|url-status=live}}</ref> [[Jodie Whittaker]] overtog rollen som den [[Trettende Doktor]] i slutningen af 2017 i årets julespecial, og hun er den første kvinde der er blevet castet som karakteren. Whittaker har tidligere spillet i TV-serier såsom ''[[Return to Cranford]]'', ''[[Broadchurch]]'' sammen med [[David Tennant]] ([[Tiende Doktor]]) og den dystopiske antologi ''[[Black Mirror]]''.<ref name="ThirteenthDoctorCasting">{{cite web |url=https://www.telegraph.co.uk/tv/2017/07/16/doctor-jodie-whittaker-replace-peter-capaldi-time-lord-regeneration/ |title=Doctor Who: Jodie Whittaker is to replace Peter Capaldi in the Time Lord regeneration game |work=The Telegraph |date=16. juli 2017 |access-date=16. juli 2017 |archive-date=18. juli 2018 |archive-url=https://web.archive.org/web/20180718015944/https://www.telegraph.co.uk/tv/2017/07/16/doctor-jodie-whittaker-replace-peter-capaldi-time-lord-regeneration/ |url-status=live }}</ref> Serien introducerede Tidsherrernes evne til at ændre køn under regenerationer i tidligere episoder, først i dialog, så med [[Michelle Gomez]]s version af [[Mesteren (Doctor Who)|Mesteren]].
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