This is the episode where everything finally clicks. Many of the season's outstanding questions are answered, and the underlying narrative is exposed. The final ten minutes of the episode is a cascade of reveals, twists, and turns. In my opinion, this episode manages to outdo episode 7, which is quite an accomplishment. One truly remarkable thing about the episode (particularly the final sequence) is that there is a real sense that anyone can die, and someone will.
Of course, while it is easy to focus on the fantastic closing to the episode, it is important not to forget the rest of the episode. Even without the ending, it's one of the better instalments so far. It checks in with most every major story-line, smoothly weaving them together and bringing them all to a crisis point.
If Westworld runs as long and as successfully as HBO's current flagship show (Game of Thrones) has, this episode will be looked back on as one of the series' best, and the moment that cinched it as the new big show.