The word 'Torchwood' is what in relation to 'Doctor Who'?
Torchwood BBC Three Controller Stuart Murphy invited Davies to develop an after-watershed science fiction series for the channel. During the production of the 2005 series of "Doctor Who", the word "Torchwood" (an anagram of "Doctor Who") had been used as a title ruse for the series while filming its first few episodes to ensure they were not intercepted. Davies connected the word "Torchwood" to his earlier "Excalibur" idea and decided to make the series a "Doctor Who" spin-off. Subsequently, the word "Torchwood" was seeded in "Doctor Who" episodes and other media that aired in 2005 and 2006. Because "Torchwood" is shown
Doctor Who (series 2) much as the first series was) due to the cost involved in creating another planet, according to Davies. Only two stories are set on another planet. The second series encompassed a loose story arc based around the word "Torchwood", which first appeared in the 2005 episode "Bad Wolf". The mythology of Torchwood is built across the series; in "The Christmas Invasion" it is revealed to be a secret organisation which possesses alien technology, and its establishment is shown in "Tooth and Claw". Contemporary Torchwood is finally visited by the Doctor and Rose in "Army of Ghosts"/"Doomsday", at which point it