The passing of Sid Caesar, a comedic genius if ever such a term could be used without fear of hyperbole, reminds us that television once had what its fans considered a Golden Age. The very name of Caesar’s early-fifties landmark, “Your Show of Shows,” exemplified a time when the medium flourished and entire genres were being invented. More than half a century later, we are witnessing - on 60-inch, wall-mounted screens, no less - television’s second Golden Age.