Leave It To Beaver is still a fairly well-known sitcom, and even had a spin-off years later that showed the Beaver as an adult. What you may not realize is that the series finale, the clip show (used properly), and sitcoms focused more on the kids than their parents, all started with this show. Me-TV makes the case, though it also mentions a certain puppet show that also got a final episode, a rarity with TV shows no matter when they’re told this is their final season.