Army of Ghosts stopping them. Mickey believes that the Cybermen are in control of the sphere and produces a gun to destroy whatever is in it. Rose is horrified when the sphere opens and reveals its occupants to be a quartet of Daleks, who identify their location as Earth and begin chanting, "Exterminate! Exterminate!". The majority of this episode takes place in the Torchwood Institute, which is seen on screen for the first time. The phrase "Torchwood" originated from an anagram of "Doctor Who" used to conceal the "rushes" tapes during the filming of the first series. It was an arc word used
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,