Fort Blockhouse, Gosport, UK
(Filming emergency submarine escape.)
St Peter Port Harbour, Guernsey, Channel Islands
(scene with the preparation for the abortive first mission is clearly filmed on Castle Pier, and in the waters around Herm and Sark. Historians won't miss the irony of this. At the time the film is set, German troops would have occupied the pier.)
Pinewood Studios, Iver Heath, Buckinghamshire, England, UK
(studio: made at Pinewood Studios, London, England)
Sep 20, 1954
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