It stars Ralph Richardson, Deborah Kerr, Hugh Williams and Griffith Jones, and was directed by Harold French from a script written by Anatole de Grunwald, Patrick Kirwan and Terence Rattigan, based on a story by Frank Owen.

They then come back to his home port of Langedal, and Metcalfe goes to Oslo to report this to the British embassy there, despite the best efforts of the German Kommandant and the German-sympathising local police chief Ottoman Gunter.

It was Lockwood who had got him the foreign correspondent job at the outbreak of war, but he now passes on the news to Metcalfe that he has been fired from it for sailing out with the fisherman rather than staying on dry land where the paper can contact him.

Alstad's daughter Kari (who had accompanied them on their voyage) also meets him to tell him of suspicious German merchant ships at Bergen which her father suspects have troops on board.

Back in Britain as the Blitz begins, Metcalfe is persuaded not to join up and instead to start a press campaign for the public to make economies on the Home Front to help win the Battle of the Atlantic.

Just about to set out on it, he is called upon by the Admiralty to be parachute-dropped back into Langedal,[3] sabotage a camouflaged U-boat base nearby, and escape across the border into neutral Sweden.

Special mention should be made, however, of Deborah Kerr, who lends quiet courage to an unrewarding romantic part, and Francis L Sullivan, who makes a most malevolent Nazi".