Nominated for four Oscars, this film is not only considered by most to be Hitchcock's best, but one of the greatest movies ever made, and I only watched it for the first time a few days ago.
Professional photographer L.B. Jefferies breaks his leg on the job and becomes wheelchair bound only to spend his time watching his neighbors from their open windows in the summer heat to pass the time. Eventually, he suspects that one of them has committed murder.
Something I found extremely interesting about the movie was how during filming Hitchcock only worked from the set of Jeff's apartment, and earpieces were used for him to communicate directions to the other actors. This means he watched and directed everything as we see in the film and helped him make the visual aspect of the film so striking, even when it is all set in apartments.
You would think that this limited setting would make the audience feel cramped and bored but Hitchcock is able to run with it in such a way that draws suspense as we see the events unfold as Jeff does. Similarly interesting, all of the sound, both talking and music, in the movie comes from the world in the film and is heard by the characters (diegetic sound) adding to the realistic immersion that is felt as the audience watches.
The seemingly simplistic premise of the film along with unique restrictions on the way the actors must portray their characters, with either limited movement (Jeff) or little to no dialogue (the neighbors), while also maintaining a level of not-giving-too-much-away suspense marks this as a unique masterpiece for its time and continues to influence the industry to this day.
Psycho and Vertigo both remain my favorite Hitchcock movies, but this has become a close second.