Now on Netflix (in Italian with subtitles), this is a four-part true crime drama about a serial killer who terrorized Florence in the 1970s and 1980s. The unique M.O. of the killer was that he killed couples that were sleeping or having sex together.
The story is told by picturing the police theory of the case. Since three successive theories proved incorrect, it re-starts the narrative after each failure, and some scenes are shown four times from four different points of view. There is no real conclusion, since the case is still considered unsolved, so we are left uncertain about when, if ever, we have seen the real story. (There were many more arrests and trials after the ones shown here, and the subsequent theories were crazier than anything shown in this series, so perhaps there will be a second season. The most far-fetched theory is that the Monster and America’s Zodiac Killer are the same person. You can get up to speed on Wikipedia if you’re interested.)
Francesca Olia is a major character, but her nude scene, which is shown in each of the first two episodes, reveals very little.
The actual nudity takes place only in unpleasant circumstances (victims being killed and mutilated), and the naked actresses appear only in the murder scenes.
Francesca Olia in episodes 1 and 2
Catarina Rossi in episode 3
Giulia Battistini in episode 4
Chloe Broussard in episode 4

Interesting trivia is that the lead investigator of the case was the same one that had the Amanda Knox case. A real piece this guy. The book by douglas Preston and Mario Spezi is pretty good and the authors have been harassed by the italian police because of the book.
Preston and Spezi nail it cold. They got the guy.
And they weren’t just harassed. Preston, who had moved to Italy, had to flee. He can never return because they’ll likely lock him up on trumped up charges.
The book is a horror story about Italian police as much as serial killings.