Here is some information about the plot of The Films of Alfred Hitchcock by Humphrey:

* The first act sets up the characters and the story.
* The second act progresses to a high point of conflict.
* The third act resolves the conflicts and problems.
* Hitchcock's films often employ themes of intrigue, suspense, murder, romance, sexuality, dark humor, and a wrongly accused man.
* Hitchcock used every aspect of filmmaking to build suspense, including screenplay, cutting, photography, and sound.
* Hitchcock's techniques included extreme close-up shots to reveal a character's emotions and point-of-view shots to show what the character was seeing.

Hitchcock was one of the first auteurs and one of the most influential directors of all time.