Torchwood is a British science fiction television series that serves as a spin-off to the long-running series Doctor Who. Set in Cardiff, the show follows the exploits of the Torchwood Institute, a secret, non-governmental organization tasked with investigating extraterrestrial incidents and managing alien technology that falls to Earth. Led by the enigmatic and immortal Captain Jack Harkness, the team operates from a hidden base known as the Hub, located beneath Roald Dahl Plass. The series explores the moral complexities of defending humanity against threats from beyond the stars, often dealing with darker, more mature themes than its parent show. As the team faces rogue aliens, temporal anomalies, and internal betrayals, they must navigate the personal toll of their work, which frequently forces them to make impossible choices for the greater good of the planet.