@AstroKatie OK, that was pretty great, ty (and thanks to @siracusa for boosting so that I saw this).

Seems like every year or two I try "yet again" to understand quantum stuff. Maybe this will be the time I finally get it. The first episode was good in that there was info I hadn't heard before (the "wavelength of a fastball" was a neat phrase. I'd never thought through that something has to be moving to have a wavelength (duh, in retrospect)).