Episode #1.3
- Episode aired Dec 5, 2017
- 47m
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.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.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.