Alfred Hitchcock's North by Northwest

North by Northwest was made in 1959; it is a classic thriller because it has all the elements which are required in a thriller film. I only watched thirty minutes of the film and all the elements were included in the first fifteen minutes of the film such as a villain driven plot (kidnapping, wanting the hero to co-operate) hero (innocent, mistaken identity) cliff-hanger (in this case the hero in the film was literally hanging off the cliff) tension, excitement and suspense (the audience would all be wondering in their minds 'will the hero survive or die?').