I couldn't tell you anything more specific, but I do recall a very late "Laverne and Shirley" episode, possibly from the time when Shirley was gone, where Laverne made a joke about the space shuttle...in 1965. I haven't seen it since it aired but I often think of a similarly late episode where Laverne sets up an obstacle course or something in her apartment so a ghost could win a medal. Even at 9 or 10, I thought that it was the stupidest thing I'd ever seen. I barely remember any particular "Happy Days" episodes but I remember totally blubbering when I watched the last episode. I had never known life without it!