Catch all 17 episodes of "Lidsville," a children's television series that debuted in 1971 and features an unusual assortment of characters "brimming" with fun and energy: hats. Viewers discover this great new world with the help of Mark (Butch Patrick), who finds it through a magic talking hat that takes Mark there and introduces him to all his friends. Unfortunately, he meets the menacing Horatio W. Hoo Doo (Charles Nelson Reilly), too.