Don’t F With Cats: Hunting an Internet Killer is a three-part documentary series that delivers exactly what the title says. A group of people who only know each other through Facebook find a disturbing video of an anonymous man murdering two kittens. They begin working together to identify the man to expose him and bring him to justice. The murderer responds by toying with them, setting up fake clues and sock puppet accounts to throw them off his track before uploading more videos. The increasing number of references to real life serial killers and obsession with fame lead the group to realize that the murderer is gearing up to switch to human victims.