Long before 9/11, a far deadlier, little-known attack from the ocean depths struck our shores, lasting three-and-a-half years and claiming 5,000 lives. Now, famed undersea explorer Bob Ballard, discoverer of the Titanic, investigates the wreck of one of the attack craft, a German submarine that lies at the bottom of the gulf just a few miles off New Orleans. U-166 was part of Operation Drumbeat, a highly successful U-boat operation that caught East Coast cities and shipping almost completely unprepared. Ballard probes the wreck and unravels a dramatic mystery in the official story of the sub's sinking.

NOVA Season 42 Episodes...

• s42e01 - Vaccines Calling the Shots
• s42e02 - Rise of the Hackers
• s42e03 - Why Planes Vanish
• s42e04 - Surviving Ebola
• s42e05 - Ben Franklin's Balloons
• s42e06 - First Air War
• s42e07 - Bigger Than T. rex
• s42e08 - Emperor's Ghost Army
• s42e09 - Killer Landslides
• s42e10 - First Man on the Moon
• s42e11 - Big Bang Machine
• s42e12 - Sunken Ship Rescue
• s42e13 - Sinkholes-Buried Alive
• s42e14 - Colosseum - Roman Death Trap
• s42e15 - Petra - Lost City of Stone
• s42e16 - Hagia Sophia: Istanbul's Ancient Mystery
• s42e17 - The Great Math Mystery
• s42e18 - Invisible Universe Revealed
• s42e19 - Nazi Attack on America
• s42e20 - Lethal Seas
• s42e21 - Chasing Pluto
• s42e22 - Nuclear Meltdown Disaster

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.