Here's "Elio Petri" with his unique style in moving camera and guiding his favorite actor "Gian Maria Volonte". I had watched his Indagine su un cittadino al di sopra di ogni sospetto (1970) and la Decima vittima (1965), and enjoyed them both. Also here was an alive screenplay and performance, plus very dynamic editing. With the special Italian sense of humor, even when they're talking politics, the whole film was delicious.
There were many memorable scenes, particularly when Lulu was meeting Militina in the asylum. The last scene was genius.