An amusing theme today - three fifteen-letter answers, the beginnings of which spell out "HAR, HAR, HAR," or, LAUGHINGOUTLOUD (65A: Bit of textspeak, unsharpened ... or a hint to the starts of ...). It's not every Monday that we see four answers that span the whole grid, so that's nice. On the down side, two of the three theme answers are quite old fashioned. "The Hardy Boys" and "Harper Valley PTA?" You've practically got to be a HARVARDGRADUATE to get those ancient references!
As for the rest of it, there's plenty of dusty supporting material. ALF (25A: Furry TV extraterrestrial) (off the air before XCI), ALI (35A: "Float like a butterfly, sting like a bee" boxer) (last fight, 1981), OZAWA (16A: Seiji ____, former Boston Symphony director) (retired 2002). OK, so maybe they're all classics. So is Deborah KERR and KUBLA Khan, but it doesn't make them any less "fresh." Add to those staid answers Latin like ETTU and QUA, and standbys like ETNA, SERE, ALEE, SWEE, ELAN, EZRA, AFRO, and URSA, and you've got an uphill battle on your hands.
Everything just seemed a little flat. Maybe it's me. I've had a pretty rotten day.