Kanal is a 1957 Polish film directed by Andrzej Wajda, telling the story of a group of Polish resistance fighters and civilians escaping the Nazi onslaught through the city's sewers during the last days of the Warsaw Uprising. As Lieutenant 'Zadra' (Wieńczysław Gliński) leads his dwindling unit on a perilous journey through the sewers, he must confront the mental strain of their situation, while characters like Stokrotka (Teresa Iżewska) and Sergeant 'Kula' (Tadeusz Gwiazdowski) struggle to stay resolute.