 The Spies Who Lost the Battle of Britain
On the brink of the Second World War, the Graf Zeppelin airship crossed the North Sea on a daring spy mission.
What happened in the next 24 hours was to decide the future Battle of Britain.
This revealing new DVD documentary tells the story of British radar and how the Germans nearly discovered its secrets.
Watch this 'Intro' clip to the documentary.
You can find more information and view more clips from the video at http://www.boffinstv.co.uk/
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