Similar to Charade?
I was watching this movie today on TV (Turner?) and got to thinking about the similarities to Charade. http://imdb.com/title/tt0056923/
Both women get caught up in international intrigue where they have NO idea what is going on. She's got those cigs and Hepburn had those stamps. There is the handsome cop guy who falls in love with her. Both end on/around the stage of a large theatre in great suspense.
Just something about the timing and the "feel" of the movies remind me of one another. Whistling past the cemetary, I guess....