: Unusually for war films of the era, it avoids heavy jingoism, portraying the Italian divers not as fanatics but as skilled, professional adversaries performing dangerous work.
: Crabb, played by Laurence Harvey, starts with no diving experience and must rapidly build and train an "Underwater Working Party" with limited resources. The Silent Enemy(1958)
: It explores the psychological tension of an invisible enemy that attacks from the shadows of the harbor. : Unusually for war films of the era,