The Battle of the Atlantic
Keeping Secrets
S1 • E2 Jul 14, 2002 2h 15m
8.0
In the first 18 months of war, German U-boats sank more than three million tons of shipping. Eyewitness testimony, archive film and reconstructions illuminate the story of how Allied intelligence fought back against the killers in the deep, helped by the seizure of an Enigma code machine and cipher material.
