Lucy, alone and terrified, can't imagine why she needs to do this and refuses. Faber appears - Lucy has bashed his hand reaching through the door with an axe, wounding him badly, but Faber finds her beloved little boy sleeping in a cot and threatens to kill him if she does not do as he says, which is to allow him access to the radio. He begins using the radio to report to the Nazi U-boat which has been waiting for him off the coast of Storm Island. But just as he is about to impart the information that Patton's supposed invasion-strength army set for Pas de Calais is, in fact, an elaborate ruse of fake airplanes and tanks (a true-life deception to fool the Nazis of the real location of D-Day at Normandy, which succeeded), Lucy overhears this and grasps why the radio needs to be destroyed; she blows the lighthouse's fuse using her own hand in a light socket, hurting herself but rendering the transmitter useless and Faber's vital information unheard. Faber expresses admiration for what Lucy has done, telling her that the war has come down to the two of them. This poignant, brief affair between two lonely strangers has been supplanted by their higher loyalty to their own nations. Considering Lucy no longer a threat, and possibly because he really has fallen in love, Faber doesn't murder her, as he has done so unhesitatingly to anyone else in his path, but strides towards the shoreline cliffs to reach the previously-arranged U-boat, now visible off-shore. Lucy, now fully aware of the stakes involved, runs out after Faber with her husband's revolver. She shoots at him and misses. Shocked, Faber begins to race down the cliffs when her third shot hits him in the leg. Bleeding and in pain, Faber still gets to shore and pushes the boat into the water, while Lucy begs him to stop. When he doesn't, Lucy takes one last aim and hits him square in the chest. The spy, determined to complete his mission to the end, manages to clamber into the boat, but has no strength left to row. The two lovers stare hopelessly at each other until Faber falls dead, face forward in the boat, before Lucy's horrified gaze. Alternative ending Having been unable to transmit his information or reach the U-boat to get away safely, Faber's mission has been thwarted.