 Bob Newhart went on to have two sitcoms in which he portrayed mild-seeming men, the first a Chicago psychologist, the second a Vermont innkeeper, trying to maneuver in a world of colorful characters. And, of course, there's the world that introduced him to a new generation, Papa Elf, an elf. In 2002, Bob Newhart won the Mark Twain Prize for American Humor. On the stage of the Kennedy Center that night, he told a crowd in silken sequins, Standing here...