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
Eternal (Doctor Who) War between the Time Lords and the Daleks, the Eternals were so affected by the violence and the damage to space and time that they left the mainstream five-dimensional universe completely, never to be seen again. Eternal (Doctor Who) The Eternals are a race of cosmic beings first introduced in the "Doctor Who" TV adventure "Enlightenment" with the 5th Doctor (Peter Davison) in 1983. An Eternal who called himself Striker explains to the Doctor that he and his people live outside of time, in the realm of eternity. They consider the mortal inhabitants of the universe to be "Ephemerals", including