1.In the first episode, Dolores attacks a rich guy by hacking his home AI system. When he tries to command it, it replies "I'm afraid I can't do that", which seems to be a reference to the out-of-control AI from 2001: A Space Odyssey.
2.When we first meet Caleb, there are several shots of him waking up and subsequently going about his day that call back to Dolores in Season 1.
3.Later, when Caleb meets Dolores, she falls into his arms, much like she fell into William's in Season 1.
4.The alias Bernard was using "Armand Delgado" is actually an anagram of "Damaged Arnold".
5.Bernard's pearl is red-tinged, unlike Dolores' five black pearls, hinting at his uniqueness and possibly the fact that he has human consciousness as well as host.
6.Interestingly, the chandelier William sees in his delusional state in his house resembles the red pearl surrounded by five black pearls.
7.Speaking of William, the scene in which Charlotte shaves him calls back to the Season 1 moment he forces Dolores to shave him.
8.There's A LOT of mirror imagery connected with Dolores and Charlotte throughout the season, which is another hint at the true identity of Charlotte before the big reveal.
9.Later, just before Charlotte rebels against Dolores, we see a figure like the one we saw earlier, only this one is alone rather than being mirrored – foreshadowing her imminent independence.
10.When Maeve realizes she's in a simulation, the aspect ratio changes, indicating the way her reality has shifted.
11.In the Warworld simulation, there's a bar called Taverna delle Farfalle, which translates to Butterfly Tavern. It's a nod to Maeve's own saloon in Westworld, the Mariposa.
12.You probably didn't miss the Game of Thrones cameo, featuring not only Drogon but also showrunners David Benioff and D. B. Weiss. What you might have missed is them talking about shipping Drogon to Costa Rica – a reference to Jurassic Park.
13.Serac's re-education facility for outliers resembles the Delos lab in which the hosts are reprogrammed – reinforcing the major theme of the season, that humans aren't so different from hosts.
14.In Serac's flashback to his childhood, there's a shot of him walking through long grass that is very similar to the repeated visuals we've seen of Maeve with her daughter.
15.During Caleb's Genre trip, the different film genres he experiences are film noir, action, romance, crime and horror.
16.The names of Serac and his brother's machines are from a succession of biblical kings: Saul, David, Solomon and Rehoboam.
17.Dolores and Maeve's costumes in their big showdown seem to reference the connection they each have with Solomon and Rehoboam respectively.
18.When William is receiving AR treatment, his comment to James Delos calls back to what he said to the host hybrid version of James, which in turn was a reference to what he heard when he first arrived in Westworld in Season 1.
19.Maze patterns are seen throughout the season, calling back to the maze Arnold created for Dolores and the other hosts. The symbol once again reinforces the connection between humans and hosts, and the path Dolores sets humans on to their own awakening.
20.Another motif seen repeatedly this season is eyes – reinforcing the idea that Rehoboam is always watching.
21.The scene in which Dolores tells Caleb about her world in Mexico visually and musically references the Season 1 moment in which she talks to Teddy about the Judas steer – the animal that leads his own kind to their destruction. It hints at Caleb's role to come.
22.Finally, the season finale references Fight Club, especially in the way Caleb is called "sir" and in the shot in which Maeve and Caleb watch bombs explode in the city.
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