The Good Old Days of TV

As a kid, I spent many a half-hour watching this show. It was not only entertaining, had a great mystery feature (bloodhound gang), but because it was educational (and aired on PBS), my mother couldn't find a reason not to let me watch it. Those were the days! I'd love to be able to show old episodes of this show to my kids, but they're really not available online - at least that I could find...