In this episode there are "Time People" who move in a slightly different dimension. We see them as a slow-moving blur... they hide your keys, move stuff so you can't find it, and love to cause gremlin like disruption in people's homes.
My family always blamed the "Time People" when ever we couldn't find something. I'd guess it was around 1981. I've searched all twilight zone, outer limits, amazing stories, but can't find anything about this! I'd really like to find it. It was really creepy too!