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3 Episodes 2017 - 2017
Episode 1
Sir David Jason looks into how the British Secret Service operated during WW 1. He visits Belgium and meets people who are war aficionados or experts on methods used to pass messages to the allies.
Episode 2
Sir David finds out how the best brains in Britain were recruited to help win a very secret war.
Episode 3
47 mins
Sir David searches out Britain's eccentric amateur inventors and backyard boffins, who played a key role in the defeat of Hitler and created the machinery of 21st-century surveillance.