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
David Bradley (director) David Bradley (director) David Shedd Bradley (6 April 1920 in Winnetka, Illinois – 19 December 1997 in Los Angeles, California) was an American motion picture director, actor, film collector, and university instructor. David Shedd Bradley was a grandson of Charles Banks Shedd, a prominent Chicago real estate investor, banker, and financier, and civic leader who also served as an executive officer of the Knickerbocker Ice Company of Chicago, which had been founded principally by Edward Avery Shedd, younger brother of Charles Banks Shedd. He attended the Todd School for Boys (from which Orson Welles had graduated in 1931) from 1935