characters-
One of the first immediate thing that shows north by north west is in the thriller genre is because of the mistaken identity of the innocent.The protagonist roger is mistaken for a man name George Kaplan. This happens because when George Kaplan's name is called roger puts his hand up at the wrong time whilst trying to get the bar employees attention for him to contact his mother.this led to the story line being complex because the audience was baffled and didn't know what was going on when the two hit men kidnapped him.this created enigma for the characters which made them ask questions.the antagonist.Hitchcock also makes this a stereotypical thriller because the protagonist is put in danger.the antagonist is introduced later on and is set on to kill the wrong man.

sound
A slow establishing shot of where George kaplan is at the crop duster scene emphasis's his vulnerability.the off screen sound of the crop duster coming down is first shown as an off screen sound as it gradually gets louder and louder then it becomes an on screen sound where the bus is also coming on the road at the same time.the off screen sound fits the conventions of a thriller because we dont know whats coming so it brings suspense.then when the duster gets closer it makes the audience go to the edge of their seats because it builds a tense atmosphere for us but for roger it is quite threatening as it is a parallel sound.
red herrings
When thornhill is
meant to be meeting this undercover person there are some objects that the
audience feel could be what this mystery antagonist is coming from. The first
one could be the bus that drives past. This is a red herring because the
audience immediately think that thornhill is about to meet this man and end up dead.
But that is not the case as the car continues to drive past. As this medium
shot of thornhill watching the bus drive past shows the strangeness of the atmosphere.
Red herrings give the audience false/misleading information and that is what
the bus did in this scene. When the police
are ordered to take Roger to the American spymaster they call the professor,
who then explains the plot that George Kaplan never existed; he was only a
red herring, meant to distract the enemy from the real agent
editing 
a variety of continuity editing techniques is used in North by Northwest to create both
smoothness and suspense. The first editing skill used is an establishing shot. Usually a establishing is used when a new scene transpires. Hitchcock utilizes an establishing shot to provide
a overview to a scene. These establishing shots avow audience members to understand what is going on. The second continuity shot is when Roger Thorn hill first encounters Phillip Vandamm, Alfred Hitchcock uses the shot reverse shot throughout the conversation. The reverse shot pattern allows the viewer to see the reaction of the character’s faces more closely, which adds suspense to the film.


