Barney dumping Thelma Lou always was a sore spot in the series. But, Barney does have a history of making poor choices. Lots of references early to Barney's frailties. Obsessed with fresh air, needing antacids, needing a nightlight. Were the writers hinting Barneys poor Thelma Lou choice maybe is because he was down in the dumps, in a rut? Either way it's a stunner when Barney's finds out TL is married. So many memorable scenes in this stellar episode. A few are the woman saxophone player, battle axe ex teachers grilling belittling and hilariously asking Barney to spell necessary, wonderful Floss (Barbara Perry), Barney easing the pain with booze, first TAGS appearance of lovely Alberta Nelson. A bittersweet episode. Wonderful viewing, but sad Don Knotts & Betty Lynn leaving TAGS raises the question of all the great episodes there might of been had they stayed. Don Knotts still had his comedic brilliance. His color episodes are all classics.