I can't recall if I have seen North by Northwest but will be going to check it out since the Judge says it is one of his favorites.
North by Northwest is a very good movie, but not nearly as good as Rear Window or Strangers on a Train. Trust The Ghost Of FReepers Past on this matter. LOL!
And be aware that understanding Hitchcock means knowing the rules of his film techniques among which is that policemen and politicians are usually the bumbling fools.
I wonder if Roberts knows this and naming a Hitchcock film was a back door way of slamming these fools.