The Doctor (Doctor Who) footage. Tom Baker did reappear, but as "the Curator", an ambiguously different character who he was not credited for playing. A voice actor, John Guilor, recorded a line of audio impersonating the First Doctor, for which he was credited as "Voice Over Artist". In other multi-Doctor stories, the multiple actors are all credited as "The Doctor", the exception being "The Three Doctors" (1972–73), which credited William Hartnell, Patrick Troughton and Jon Pertwee as "Doctor Who" as the 1972 serial preceded the practice of crediting the character as "The Doctor". In "Human Nature" (2007), the plot involves the Tenth Doctor altering
Regeneration (Doctor Who) 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 portrays the Thirteenth Doctor, the Doctor's first female incarnation. Female Doctors were previously explored in spin-off productions; Joanna Lumley appeared as a satirical version of the Thirteenth Doctor in the 1999 Comic Relief special "The Curse of Fatal Death". Arabella Weir also played an alternate Third Doctor in the "Doctor Who Unbound" Big Finish episode "Exile". Neither portrayal is typically considered to be within the show's main continuity. Spin-off media have also depicted more drastic