This post discusses the Nov. 27 episode of “Westworld,” “The Well-Tempered Clavier.” When “Westworld” premiered earlier this fall, it offered an unusual promise to viewers, or at least to this viewer.

This spring, the pianist Jeremy Denk was supposed to present a three-part series on Bach’s “Well-Tempered Clavier” in WQXR’s Greene Space, in downtown Manhattan, but, with the city locked down, he is ...