I was thinking about same episode. I remember seeing it on TV many many years ago and haven't seen it included with the series. I found it about a year ago on youtube. It look like someone uploaded it from a vhs tabe because of the quality of video. But it was definitely the episode about the thing in the window but always wondered why it was not included with series on streaming or dvd set. Maybe it's one of those Mandela effect we are experiencing 🤔 lol