Intercept: A Century of Signals Intelligence (2023) - Documentary Movies 109 minutes. . A thought provoking documentary feature film providing a comprehensive exploration of the evolution of signals intelligence over the past century. Whether you're intrigued by the secretive world of intelligence agencies or concerned about the implications of digital surveillance, this film will leave you with a deeper understanding of the role signals intelligence plays in society. espionage, technology, secret mission, secret intelligence service, intelligence, secret society, secret organization, controversy, listening, national security agency (nsa), conspiracy theory, secret government organization, listening device, code breaking, surveillance, information leak, secret service, computer expert, british history, questioning, century, mi5, weapons history, international intrigue, cybersecurity, information war, whistleblower, cybercrime, computer history, ethics, political scandal, counter intelligence, cyber terrorism, bletchley park, army intelligence, military history, british society, war journalism, cyber warfare, expert opinion, secret code, political history, computer technology, cyberwar, surveillance specialist, thought provoking, surveillance state, new technology, security expert, england history, internet surveillance, enigma machine, big brother, conspiracy theorist, history, spies, historian, eye witness, mass surveillance, cold war era, digital technology, former operative, wikileaks and surveillance, counter-espionage, gchq, eyewitness account, advanced technology, cybersurveillance