I remember this movie! I was just a teen and it was on PBS. It was pretty eerie. I used to watch a lot of stuff on that station. I also have always admired Joan Hackett. She had something special as an actress, she died way too young. She was quite mesmerizing in this. I wish I could see it again sometime but so far have never seen it repeated. It's strange that I have remembered that program all of these years. I guess it must have had quite an impact on me, and then, having just read the previous comment, I find I am not the only one! I thought the story was very well done. It started to give me the creeps right at the beginning and kept me glued to the screen until the end.