 The episode re-introduces Captain Jack Harkness, who had proved popular in the first series of the 2005 revival of "Doctor Who", as the leader of Torchwood, a team of alien hunters.The story is told from the perspective of Gwen Cooper (Eve Myles), who comes across the Torchwood team through her job as a police officer with the South Wales Police, who are investigating a series of strange deaths in Cardiff.Through Gwen's discovery of Torchwood, the audience are introduced to team members Owen Harper (Burn Gorman), Toshiko Sato (Naoko Mori) and Ianto Jones (Gareth David-Lloyd).