I would highly recommend THE DARK AT THE TOP OF THE STAIRS. On my local Channel Six - they had two movies a day....Morning Theatre and Frances Farmer Presents.
The movies that were too long or too racy to show on those programs were shown on Saturday night at 11:30 on The Best of Hollywood (in color).....that's where I first saw DARK.....
Probably the first time I saw Robert Preston.....Dorothy McGuire, Angela Lansbury, Lee Kinsolving, Shirley Knight, and especially Eve Arden were very memorable.....