North By Northwest(1959)
The Alfred Hitchcock mistaken-identity suspense classic featuring two of the most memorable moments in cinema: Cary Grant being chased by an airplane in open fields, and the climatic fight atop Mount Rushmore.
"Cary Grant plays a Manhattan advertising executive who's mistaken for a government agent. His attempts to clear up the misunderstanding only implicate him in a murder that makes him the target in a nationwide hunt. Forced on the run, he's faced at every turn by assassins out to kill him, and the mysterious Eva Marie Saint who's only too keen to help." (BBC)