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Next airing Wed Apr 5, noon ET

In Shallow Water

Tourists flock to the beaches of North Carolina and Virginia for their safe, calm waters and the wild, rugged scenery. But beneath the serenity of this Atlantic coastline, there is a dark danger lurking. There have been two shark attacks in the past 10 years, and until the mystery is solved ... no one is safe. The sharks come out of nowhere, and then disappear as quickly as they came, leaving a bloody massacre in their wake.