Killer U-Boats Drain the Oceans : Season 2 Episode 3
TV-PG (self-applied) National Geographic 47m
Aired: June 17th, 2019 @ 9:00 PM EST on National Geographic
Draining the oceans reveals the story of the U-Boats as they took on the Royal Navy, sinking 12 million tons of ships and nearly winning the war.
