The internet is great for finding things when you have enough clues to help you search, but I have never been able to find information on a TV production that I saw in the late 1960’s, probably on a San Francisco PBS station. Called, I believe, simply The Box, it featured a man sitting on a stool in a small and otherwise empty room. Various people from his life would enter and speak with him, recounting their relationships and evoking different memories, but he was never allowed to leave the room. I was very young when I saw this, probably 8 or 9, but it was transformative. I had never seen anything on TV quite like that before. I wish that I could find out more information about it.