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In May 1940, it looked like the deadly 'wolf packs' of German U-boats would sever Britain's Atlantic lifeline and force her to surrender.
First Air Date : Aug 30, 2009
Last Air date : Sep 20, 2009
Episode : 4 Episode
Season : 1 Season
Runtime: 45:14 minutes
Studio: National Geographic Channel
Country: United Kingdom
Cast:
Crew: