The FIRST Twilight Zone episode you saw

I don’t remember which I saw first, all the way through. I thought it might be “Twenty Two” (Room for one more, Honey), but then I remembered I read the story before I saw it, and I didn’t discover the book until later. I was young and lived in Eastern Time most of its run; my dad liked it but I had better things to do. Anyway, I had One Step Beyond, Science Fiction Theater, and that show with the creepy theremin theme all in syndication to fill my early Saturday mornings.