SEASON FINALE: What a perfect little streaming series this is. And by “little,” I’m not insulting the show, but praising its laser-focused beauty. Every episode is just Jerry Seinfeld, picking up his week’s guest in a vintage car, going somewhere to eat or drink, and chatting amiably. No audience. No promotions for upcoming projects. Just talk and laughter, making this arguably the purest of all talk shows. It’s such a precise concept, and Seinfeld is so revered and well-connected, that his guest list could be endless, without any repetition. But tonight, for the first time in nine seasons, Seinfeld makes room for a repeat guest: Bob Einstein, the Super Dave daredevil, and former Smothers Brothers Comedy Hour writer and performer (remember his stiffly authoritarian Officer Judy?).