It's being called a "modern re-imagining" of Shirley Jackson's 1959 novel, "The Haunting of Hill House," per Deadline.
Robert Wise directed the subtle 1963 black-and-white film, which documents a quartet investigating a notoriously haunted mansion. Julie Harris starred as the fragile Nell, for whom the house holds particular interest; alongside Claire Bloom as a stylish psychic; Richard Johnson as the doctor conducting the experiment; and Russ Tamblyn ("Twin Peaks") as the skeptical heir who's there to protect his inheritance.
Flanagan -- who's demonstrated his skill with psychological horror -- will write, direct and executive produce the series.
Enjoy the shivery trailer for the original film.