Deep Red (1975)
Another giallo that begins with a passerby witnessing a brutal crime—and then sees that witness become entangled in said crime—Deep Red stars David Hemmings (Blowup) as a jazz musician who becomes obsessed with solving the murder of a psychic who’s cleaver-chopped to death before she can name a killer she’s intuitively identified. This movie has just about every Argento go-to (Goblin soundtrack, black gloves, a quirky supporting role for Nicolodi, a traumatic event in the past that’s hinted at with disturbing flashbacks, a mysterious book that provides important clues, a twisted motive revealed only at the film’s climax…), and is ultimately as stylish as it is genuinely scary.