Hell Below - Season 1 - Eps 5: Hitler's Revenge
Just one month after the Japanese attack on Pearl Harbor, another enemy brought World War II to American shores, not through the air but beneath the sea. This is the story of Operation Drumbeat, German Admiral Karl Donitz's campaign to send U-boats to the doorstep of the U.S. and attack Allied merchant shipping from Newfoundland to North Carolina. Through archival war footage and military expert testimony, we reveal how the Nazis managed to hammer our coast again and again and why the U.S. Navy was unable to stop them.
About Hell Below

Title: Hell Below
First Air Date: 2016-04-05
Last Air Date: 2024-08-16
Status: Returning Series
Rating: 6.5/10 (from 4 votes)
Language: EN
Seasons: 4
Total Episodes: 24
Network: National Geographic Smithsonian Channel
Genres: Documentary
Production Companies: Parallax Film Productions
Synopsis
Hell Below is an event-based series charting the stealth game of sub sea warfare, tracking the dramatic narrative from contact to attack of the greatest submarine patrols of World War II. From the rise of the Wolfpack to the drive for victory in the Pacific, we profile the strategic masterminds and the rapid evolution of technology and tactics, as the threat of undersea warfare brings every sailor's worst nightmare to life. Expert analysis and stock footage are woven with narrative driven re-enactments filmed on authentic Second World War era submarines to place the characters at the heart of the action.