Trivia: The psychiatrist who treats Nell Crain (Victoria Pedretti) is played by Russ Tamblyn, who starred in "The Haunting", the original 1963 film adaptation of "The Haunting of Hill House"
Trivia: Hugh is played by Henry Thomas in flashbacks sequences. Thomas famously played the lead character Elliot in Steven Spielberg's "E.T." as a child actor in the 80's. As a reference to this fact, in the first episode, Young Luke is seen with an "E.T." lunchbox in one scene.
Trivia: In the original novel, the characters Eleanor, Theo and Luke were not siblings. In addition, the characters Steven and Shirley didn't exist in the original novel. This series - a re-imagining of the novel - made the main characters into siblings and added Steven and Shirley to broaden the cast a bit. Shirley is named after Shirley Jackson, who wrote the novel.