The Haunting of Hill House (2018)

Episode five, "The Bent-Neck Lady," is the one. Tell your companion nothing beyond the title and sit where you can see them for its last few minutes. Mike Flanagan's family ghost story, adapted from Shirley Jackson's novel, works as a drama about grief first, so it suits people who do not usually watch horror. It also has a built-in rewatch game: more than two dozen ghosts are hidden in plain sight in the backgrounds of scenes. Point them out on your second pass, never the first.