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
The Master (Doctor Who) Anthony Ainley's incarnation of the Master in his short story, "Birth of a Renegade", in the "Doctor Who 20th Anniversary Special" one-off magazine, published by "Radio Times" (and in the United States by Starlog Press) in 1983. In a short story by Cavan Scott and Mark Wright, "The Feast of the Stone", an android version of the Master is created by the Doctor as an ally—albeit a slightly sinister one. Exactly why the Doctor created an android duplicate of the Master is not revealed, but it is suggested that the Doctor somehow extended the Master's life by doing so. The