Michael “Kosmo Kramer” Richards is the guest on the final installment of Jerry Seinfeld’s web series “Comedians in Cars Getting Coffee.” Seinfeld recently tweeted that it would be the last of the quirky interview shows unless other people intervened to keep them going. He did not offer any deeper explanation. Near the end of the episode, Michael Richards addresses his racist rant on a comedy club stage in 2005. Using artful and humbling language, Richards apologizes for his behavior and thanks Seinfeld for defending him when everyone else seemed to let him twist in the wind. This CCDC series is clever, interesting, and much too intelligent to last. Sad.