Bác Sĩ Vô Danh

When the first season was being made, television pirates were desperate to acquire the preview tapes. One of the people in the office had the idea of labelling the tapes with the anagram "Torchwood", rather than "Doctor Who", as a security measure to disguise the tapes when they were delivered from Cardiff to London. Writer Russell T. Davies liked this idea so much that it later inspired him to use it as a title for the Torchwood institution and then when creating the spin-off series Torchwood (2006).

The principles of the TARDIS' universal translator are depicted inconsistently throughout the series. It is supposed to translate everything into the traveler's own language, which should give everyone perfect British accents. Yet some characters in foreign countries speak with their own accents, such as Chinese or Italian, and "colourful" phrases like "apres vouz," "adios amigos," or "sayonara" are heard in their own languages. To say nothing of the Tenth Doctor's French catchphrase "Allons-y!"

During the first series, Christopher Eccleston is credited as "Doctor Who", as set in the Classic Series. Beginning with the second series - reportedly at the behest of the show's new star, David Tennant - the credit has been changed to read "The Doctor".

In series 5, Amy has a prologue that only exists in syndicated versions and isn't present in the original UK airings. It doesn't appear on home media (DVD) either.

Edited into Ashens: Cybermen Call Centre (2006)