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 Monk (Doctor Who) an adversary of the Third Doctor and Fourth Doctor respectively. He also appears alongside the Eighth Doctor in "The Side of the Angels", the third adventure in the fourth "Doom Coalition" boxset, where he represents a group of Time Lords working with Weeping Angels to prepare an enclave in 1970s New York to protect them from the imminent destruction of the universe, only to be betrayed by the Angels and banished centuries into the past. The Hound incarnation makes a further appearance in ": The Rise of the New Humans", where he acts as the chief administrator of an exclusive