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
Torchwood England's capital city of London, its membership declining and the organisation thoroughly broken over the course of the serial. Series four starts with Torchwood fully disbanded. Jack has left Earth after the events of series three, and Gwen has retired to be with her family. The group is then unofficially reformed, this time operating primarily in the United States, joined by two fugitive CIA agents who have been framed for treason. Unlike its parent programme, "Torchwood" centres on a team instead of a single character with companions. The show initially depicts a small team of alien-hunters known as Torchwood Three,