Q:Build a movie plot around this: who knows the presence of MI 16 agent Major Smith
A:
In the winter of 194344, U.S. Army Brigadier General George Carnaby, a chief planner of the second front, is captured by the Germans when his aircraft is shot down en route to Crete. He is taken for interrogation to the Schloss Adler, a fortress high in the Alps of southern Bavaria. A team of Allied commandos, led by British Major John Smith (Richard Burton) and U.S. Army Ranger Lieutenant Morris Schaffer (Clint Eastwood), is briefed by Colonel Turner (Patrick Wymark) and Admiral Rolland (Michael Hordern) of MI6. Their mission is to parachute in, infiltrate the castle, and rescue General Carnaby (Robert Beatty) before the Germans can interrogate him. MI6 Agent Mary Elison (Mary Ure) accompanies the mission in secret, her presence known only to Major Smith.Early in the mission, two of the operatives are mysteriously killed, but Major Smith is unperturbed, keeping Lt. Schaffer as a close ally and secretly updating Rolland and Turner on developments by radio. After seeming to give up and allowing themselves to be captured, Smith and Schaffer (being officers) are separated from the three remaining members of the group Thomas (William Squire), Berkeley (Peter Barkworth) and Christiansen (Donald Houston). Smith and Schaffer kill their captors, blow up a supply depot, and prepare an escape route for later use before hitching a ride on top of a cable car the only approach to the castle. Mary, posing as a maid, is brought into the castle by Heidi (Ingrid Pitt), a deep-cover agent working as a barmaid in the nearby village; Major von Hapen (Derren Nesbitt), a Gestapo officer whom Heidi has been cultivating, becomes infatuated with Mary. Mary sets a rope through one of the castle windows for Smith and Schaffer to climb.Carnaby's interrogation, carried out by General Rosemeyer (Ferdy Mayne) and Colonel Kramer (Anton Diffring), is underway when the three other prisoners arrive and reveal themselves to be German double agents. Smith and Schaffer intrude, weapons drawn, but Smith then forces Schaffer to disarm...