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 (American actor) David Bradley (American actor) David Bradley (born Bradley Simpson in Texas, October 2, 1953) is an American actor and martial artist, known for starring in numerous low-budget action movies beginning in the late 1980s. His best-known films are the "American Ninja" sequels. Bradley is known for his role as Sean Davidson in and . He also stars in a separate film titled, American Ninja V, as Joe Kastle, which is not technically a sequel to the previous American Ninja films, but a different movie altogether. Previous to making films, Bradley worked as care salesman on Wilshire Boulevard. He attended the