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▶ See also: • It was supposed to be an easy target for the German... ▶ For broadcast dates and reruns, visit https://www.natgeotv.com/pl ▶ Follow us on Instagram: / nationalgeographicwildpl ▶ Join us on Facebook: / ngcpl "Hell Under Water: World War II" is a documentary series that describes specific episodes of naval combat involving submarines. S04E06 #nationalgeographic #natgeopl #pieklopodwodą