Even though this is NOT a Muppets movie (and lost a suit by the makers of “Sesame Street”), the director is Jim Henson’s son Brian. It takes place in a world where puppets and humans coexist, but the stuffed creatures are largely scorned. When the cast of a popular TV show starts being killed, a washed-up puppet detective and his old partner (Melissa McCarthy) team up to solve the case. The selling point (and potential source of much raunchy humor) is the streetwise, foul-mouthed, even X-rated approach to puppets. Notice I said “potential.” Even though the energy keeps it from being boring, it’s never funny. When will writers learn that F-bombs don’t make a line hilarious, especially when it’s used in almost every sentence. The best part of the movie is watching the puppeteer shots over the credits.