Cloak and Dagger is a 1946 film directed by Fritz Lang, starring Gary Cooper. Like 13 Rue Madeleine, it is a tribute to Office of Strategic Services (OSS) operations in occupied Europe during World War II. The title is based on the 1946 non fiction book Cloak and Dagger: The Secret Story of O.S.S. by Corey Ford and Alastair MacBain. Former OSS agent E. Michael Burke acted as technical advisor.