Torchwood, a spin-off from the popular sci-fi show Doctor Who, follows a group of investigators working for the secret organisation of the same name. Set in Cardiff, the team specialise in alien technology that has landed on Earth, and crime, whether it be alien or human. The mysterious Captain Jack Harkness is the leader of the equally mysterious Torchwood, and vows to guard humanity against alien threats. Curious PC Gwen Cooper accidentally discovers the group, and soon becomes entangled in a series of events. This leads up to her being hired, and becoming involved in the exciting affairs of the organisation. Together with medic, Owen Harper, and the gadgets expert, Toshiko Sato, the four explore the thrilling world of Torchwood.