The exploits a team of people whose job is to investigate the unusual, the strange and the extraterrestrial.

Torchwood Declassified is a documentary series created by the British Broadcasting Corporation to complement the British science fiction television series Torchwood. Each episode is broadcast on the same evening as the broadcast of the weekly television episode. A second series of Declassified aired alongside the second series of Torchwood.

Continuing the tradition of its parent, Doctor Who Confidential, Torchwood Declassified covers themes presented in the just-broadcast episode, as well as providing behind-the-scenes access and footage. Each episode is ten minutes long, compared to Confidential's 30-45 minute length. Following transmission, the episodes were all available for viewing on the BBC's Torchwood website, but were later removed from the site after the end of the first series. Both series of the Declassified installments have been included on the series box sets.

A ten episode companion series with events taking place during the Torchwood: Miracle Day series.