The case of the Scorpion's tail is a highly stylish giallo directed by Sergio Martino, who appears to be a giallo master second only to Dario Argento.Ernesto Gastaldi wrote this fabulous who-dunnit, quite complex but ultimately very satisfying and entertaining murder mystery. It also makes sense in the end, a big plus, 'cause that's not always the case for these giallo's, as they tend to stretch credibility with their endless red-herrings and ultimate solutions. Here, the less you know about the plot, the better.Pure giallo trademarks present here are the beautiful cinematography, the catchy music score, the gorgeous females (Anita Strindberg is a goddess), brutal murders, black gloved murderers and explicit sex scenes to name a few.In most parts it's decently acted, Goerge Hilton his usually suave self and others do fairly well. Martino directs with a sure hand, keeps things tight and atmospheric with some terrific set pieces.If you're a giallo fan, this is a must see. If you like well written and suspenseful thrillers in general, this comes highly recommended.