On Halloween, Five-0 investigates the murder of a medium with a checkered past who was apparently scared to death by a poltergeist. Also, Kono and Adam are kidnapped by what appears to be a death cult.
I just watched Hawaii Five-0 7×06 "Ka hale ho’okauweli (House of Horrors)" https://trakt.tv/shows/hawaii-five-0/seasons/7/episodes/6 #trakt