A poster for North by Northwest - North by Northwest - the movie was born from two key scenes that Hitchcock was desperate to realise. One was to be set at the United Nations, and the other was to be a chase across the presidential faces carved into the Mount Rushmore National Monument. It was Lehman's job to construct a film around these two visions, and out of them emerges a thriller so improbable that it becomes quite brilliant in evading even the most fantastic of audience guesses.