this tense, fast-paced, and overall thrilling movie is one of Hitchcock's better films, along with The Birds and Dial M for Murder. with constant mystery and threat surrounding the 3 characters as they work to solve a murder from a man's apartment, this film will keep viewers on the edge of their seats. but a particularly scary scene and implied killing make this a better fit for older kids. the murder doesn't happen onscreen, but it's clear what happens, with screaming and broken glass. a dog is killed off-screen and we see it's dead body. a man tries to push another man out a window, with the victim breaking his other leg. the scary scene mentioned above includes quietness punctuated by footsteps in a dark room. in lighter scenes, a ballerina dances some sensually in her open room, and the main villain smokes cigars.