Code Name: Emerald

World War II, year 1944. Nazi Germany knows the Allies will launch Operation Overlord - an all-out invasion of Nazi-occupied Europe via France. To learn the actual date of D-Day and landing sites in advance, a cordial but uneasy partnership has been created between the German army (Col. Brausch (Max von Sydow)), the Gestapo (Hoffman (Horst Buchholz)) and the S.S. (Ritter (Helmut Berger)), with Hoffman in charge. Six times so far they've failed to capture an "Overlord" i.e. someone who knows the information they want, and the pressure is on. Brausch tells Hoffman they have an agent working in British Intelligence, codenamed Emerald (Gus Lang (Ed Harris)), whom they then task with delivering to them an "Overlord". But Lang/Emerald is really a double-agent who is working for the Allies of World War II. Patrick Callaghan, who is motivated by money, is Lang's contact with Brausch. Lang passes on fake details of a D-Day rehearsal including a ship carrying Overlorders, and suggests that a German E-boat squadron (heavily armed fast attack boats) should intercept them. Because Lang has invented the information, the E-boats will miss the ship but Lang would still appear to have fulfilled his mission. However, Lang's superior, Col. Peters (Patrick Stewart), says they will send a real ship, manned by unknowing sacrifices and certainly no Overlorders. Allied military command decides to hold a real D-Day rehearsal, for Omaha Beach, which naturally would include many Overlords. Peters refuses to inform the military of his intelligence scheme, telling Lang that there's a high-level Nazi secretly working for the Allies (due to disaffection with Nazi ideology) whose identity must be protected at all costs. This means that the exercise is attacked by the German E-boats and many Overlorders are killed in action. Several soldiers are captured by the Germans, including Lt. Andy Wheeler (Eric Stoltz), a U.S. army signalman whose job means he has intimate knowledge of the D-Day landings in