Characters you will never see - only hear

You have seen Lum and Abner in the movies, but the characters in the movies are not the ones from the radio show, because Chet Lauck and Norris played most, if not all, of the regular characters, at least in the earlier years of the program. So you will never see Cedric Wehunt, Squire Skimp, Grandpappy Spears, Grandpa Masters, etc.