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
Doctor Who: The Commentaries official "Doctor Who" website to accompany episodes from Series 2 and Series 3 of "Doctor Who" and similar to the commentaries on "Doctor Who" DVD releases. In each episode of "Doctor Who: The Commentaries", members of the cast and crew discuss the latest new episode of "Doctor Who" whilst watching it. For example, Producer Phil Collinson and David Tennant and Catherine Tate, who play respectively the Doctor and Donna Noble in "Doctor Who", feature in the first show discussing "Partners in Crime". The full 45 minute audio commentaries for episodes from Series 4 were available as the "Doctor Who: The