Scottie's treatment of Judy could reflect the way Hitchcock treated actresses working on his films and the guilt Scottie feels could be linked to Hitchcock's Catholic upbringing
Hitchcock began his film career in the 1920s, during the Silent Era. Before becoming a director, he worked as a screenwriter and art director, so he understood how to write and build mise-en-scène effectively
The first ten feature films Hitchcock made were silent, and he famously said: "The sound could go off and the audience should still have a perfectly clear idea of what is going on"
German Expressionism is a Modernist style of filmmaking that aimed to represent the inner states of characters through unusual camerawork, lighting and editing
In his UK films, Hitchcock had taken a key creative role in every area of film production: from sets and costume, to script, cinematography and editing, and music
Hitchcock brought this approach to Hollywood when he moved there in 1940, which was unusual in the Studio System where directors were more like stage managers than artists
Camera zooming into an extreme close up shot of one of the eyes, and the colour of the frame transforming into a red hue, indicative of danger and warning