Torchwood is set in Cardiff and follows the Welsh branch of a covert agency called the Torchwood Institute which investigates extraterrestrial incidents on Earth and scavenges alien technology for its own use (its origins are outlined in the Doctor Who episode "Tooth and Claw"). To paraphrase Torchwood Three's commander-in-chief, Captain Jack Harkness, the organisation is separate from the government, outside the police, and beyond the United Nations. Their public perception is as merely a 'special ops' group.