<P> Whether Time Lords could change gender in regeneration was never addressed onscreen during the classic series and not explicitly focused on for much of the revival . In the second part of The End of Time ( 2010 ) , the Eleventh Doctor briefly checks for an Adam 's apple upon regeneration to confirm if he is still a man . In `` The Doctor 's Wife '' ( 2011 ) , he reminisces about an old friend and fellow Time Lord , the Corsair , who had been both a man and a woman several times . In `` The Night of the Doctor '' ( 2013 ) , the Sisterhood of Karn specify the Doctor could choose to change sex using one of their elixirs which influence the outcome of regeneration . `` Dark Water / Death in Heaven '' ( 2014 ) shows that the Doctor 's longtime nemesis the Master has become a woman , taking the name Missy . In `` Hell Bent '' ( 2015 ) , the Time Lord General regenerates into a younger woman , and states that her previous incarnation was her only male form . In `` World Enough and Time '' ( 2017 ) , the Doctor tells his companion Bill Potts , in reference to Missy , that Time Lords are mostly beyond gender norms and stereotypes ; however , Bill points out that the males and females of the species collectively refer to themselves by a male title . From `` Twice Upon a Time '' onward , Jodie Whittaker will portray the Thirteenth Doctor , the Doctor 's first female incarnation . </P>
<P> Whether Time Lords could change gender in regeneration was never addressed onscreen during the classic series and not explicitly focused on for much of the revival . In the second part of The End of Time ( 2010 ) , the Eleventh Doctor briefly checks for an Adam 's apple upon regeneration to confirm if he is still a man . In `` The Doctor 's Wife '' ( 2011 ) , he reminisces about an old friend and fellow Time Lord , the Corsair , who had been both a man and a woman several times . In `` The Night of the Doctor '' ( 2013 ) , the Sisterhood of Karn specify the Doctor could choose to change sex using one of their elixirs which influence the outcome of regeneration . `` Dark Water / Death in Heaven '' ( 2014 ) shows that the Doctor 's longtime nemesis the Master has become a woman , taking the name Missy . In `` Hell Bent '' ( 2015 ) , the Time Lord General regenerates into a younger woman , and states that her previous incarnation was her only male form . In `` World Enough and Time '' ( 2017 ) , the Doctor tells his companion Bill Potts , in reference to Missy , that Time Lords are mostly beyond gender norms and stereotypes ; however , Bill points out that the males and females of the species collectively refer to themselves by a male title . From `` Twice Upon a Time '' onward , Jodie Whittaker will portray the Thirteenth Doctor , the Doctor 's first female incarnation . </P>
when was it established that time lords can change gender
when was it established that time lords can change gender
The End of Time ( 2010 )
The End of Time ( 2010 )