Torrents labeled “extra upd” are often malware traps. Cybercriminals know fans want the latest episodes. They inject .exe files disguised as .mkv or require you to download a “codec update” (which is actually ransomware). The Sicilian mafia in Camilleri’s books is less dangerous than a compromised torrent client.
If you're interested in watching Commissario Montalbano, here are some legitimate options:
There are 37 feature-length episodes in total.