Men from Scotland Yard and military intelligence build a dossier on a sabotage ring.
Production
Futuristic '51 vision of London landmarks under attack.
Acting
Kenneth Griffith's twitchy traitor steals every scene.
Director
Roy Boulting
Trivia, insights & behind the scenes
Released during the Korean War, this was Britain's answer to Hollywood Red Scare thrillers — with worse budgets and better accents.
Director Roy Boulting shot futuristic '1951 predictions' of London under attack; audiences in 1951 found them terrifyingly plausible.