It was entertaining enough, and with some prestigious talking heads, but for the most part it felt like an extremely well-trodden way to make some fairly unambitious observations about SF. It was also prone to sweeping generalisations such as how no novel prior to the Mars trilogy had ever been so meticulously detailed, no film prior to 2001 had ever been so conceptually ambitious, nothing prior to Avatar had ever realised an alien ecosystem, which seemed prone to counter-argument.
Also on a more trivial note I'd have preferred it if, when talking about the NASA images of Mars that inspired KSR, we saw those NASA images - or at least ones from that era - not a random slideshow of images of Mars from all eras of exploration. Similarly, why stick a picture from Star Trek IV into a discussion of Star Trek II? Why use the remastered CGI version of the original Star Trek opening credits?
I'll stick with the rest of the series, but my expectations are suitably lowered.