The TV show Torchwood, a British science fiction series and a spin-off from Doctor Who, premieres its first episode on BBC Three.
The first season of Torchwood concludes, wrapping up its initial serialized storylines on BBC Three.
The second series of Torchwood airs on BBC Two, introducing new story arcs and characters.
The finale of the second series airs, concluding the story of the season.
Torchwood mini-series 'Children of Earth' is broadcast on BBC One, receiving critical acclaim for its intense storytelling.
The mini-series 'Children of Earth' concludes after a five-episode run.
Torchwood's fourth series and a co-production with the US network Starz called 'Miracle Day' premieres.
The final episode of 'Miracle Day' airs, finishing Torchwood's fourth series.
Torchwood Institute is established by Queen Victoria to defend the British Empire against supernatural threats.
Jack Harkness becomes part of Torchwood and assumes a leadership role in the Cardiff branch.
The Cardiff Rift, a spatial-temporal tear, is discovered and becomes the focal point for Torchwood's operations.
The Cardiff branch officially known as Torchwood Three is set up to monitor and exploit the Rift.
The Rift in Cardiff activates, allowing alien technology and creatures to slip into the city, prompting Torchwood Three's first major operations.
Torchwood Three intensifies its efforts to capture and study Weevils, hostile creatures emerging from the Rift.
Medical officer Owen Harper re-joins Torchwood Three following temporary departure.
Miracles begin happening in Cardiff due to presence of alien technology and artifacts; Torchwood investigates their origins.
Jack reveals his immortality caused by resurrection after dying in the 51st century and reintegrates with Torchwood.
Torchwood confronts a child reanimated by alien nanogenes during the 1941 Blitz, resolving the crisis.
The Rift causes temporal anomalies leading to the arrival of multiple alien entities that Torchwood must contain.
Toshiko temporarily leaves Torchwood due to conflicting emotions but returns later.
Due to interventions by Torchwood, the Rift in Cardiff closes for a short duration, reducing alien incursions.
Jack demonstrates ability to time travel, altering missions and rescuing team members from past and future timelines.
Owen Harper dies but is temporarily resurrected using alien technology, leading to ethical dilemmas within Torchwood.
Cybermen invade Cardiff via the Rift, prompting Torchwood to rally with local authorities to stop the invasion.
Torchwood begins coordinating with satellite groups and adopting more global responsibilities against alien threats.
A rift-born creature starts killing Torchwood members, leading to internal security upgrades.
After intense encounters, Torchwood Three's activities significantly ramp down due to shifting threats and strategy.
