It's 1940. German forces are prevailing over Allies across Europe. The crew of the Polish submarine, now serving in the Royal Navy, is waging a heroic fight against the invisible enemy.
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Tomasz Ziętek as Jan Grudziński
Mateusz Kościukiewicz as Andrzej 'Pablo' Piasecki
Antoni Pawlicki as Marian Mokrski
Filip Pławiak as Jerzy Sosnowski
Tomasz Schuchardt as Florian 'Trzonek' Roszak
Adam Woronowicz as Henryk Kotecki
Rafał Zawierucha as Klops
Jan Butruk as Henryk Kamiński
Michał Czorny as Alojzy Engelbert 'Stołowy Lolek' Gettka