Although the idea of casting a woman as the Doctor had been suggested by the show's writers several times, including by Newman in 1986 and Davies in 2008, until 2017, all official depictions were played by men. Jodie Whittaker took over the role as the Thirteenth Doctor at the end of the 2017 Christmas special and is the first woman to be cast as the character. The show introduced the Time Lords' ability to change sex on regeneration in earlier episodes, first in dialogue, then with Michelle Gomez's version of The Master and T'Nia Miller's version of The General.
