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.

British cinema's original sex symbol, Diana Dors, left her £2 million fortune in various bank accounts, their details and locations revealed by an apparently uncrackable cipher. In this documentary, everyone from her son Jason Dors Lake to the legendary code-breakers of Bletchley Park try to solve the mystery.

Gordon Welchman was one of the original elite codebreakers crucial to the allies defeating the Nazis in World War II. He is the forgotten genius of Bletchley Park.

This film tells the incredible story of Bletchley Park and the Ultra Secret. Filmed at Bletchley in collaboration with the Bletchley Trust and with interviews with Bletchley Veterans the BHTV team explain the importance of Bletchley to the Allied War effort. As Sir Harold Hinsley a Bletchley Veteran and Official Historian of British Intelligence during WW2 said, Ultra shortened the war by two to four year's and that the outcome would have been uncertain without it. The film also shows how the allies used the intelligence on land, sea and air. This film shows that the success at Bletchley was not just the result of a few brilliant men and women but the result of the efforts of thousands of unsung heroes.