In “Guess Who?” the host Happy Feldman plays clips from movies, speeches, and more as prods the guests to “Guess Who?” The host interviews each guest before quizzing them about the sound clips for Sheffield “silver coins.” When they guess it correctly, Happy drops the coins in empty milk bottles –– clank! When the guests get the answer wrong, Happy sounds the cowbell. Guests include WWII service me on leave, housewives, farmers, and more charming everyday people.”