When Bernard Lowe is in the abandoned B82 level of the facility, his flashlight briefly illuminates the Yul Brynner gunslinger robot from the original Westworld (1973) movie.
The strings tune played as Maeve is touring the facility is "Motion Picture Soundtrack" by Radiohead.
The piano tune played at the beginning of the episode is "Fake Plastic Trees" by Radiohead.
When Bernard enters the sub-basement level looking for the old computer system, chords of the original "Westworld" (1973) score can be heard. Specifically the signature theme of The Gunslinger character when he has malfunctioned and is persuing Richard Benjamin's character through the amusement park.
When Maeve discusses whether or not the human technician is different from her, she removes his glove. In the 1973 film, the way to tell whether the hosts were animatronics or humans was that the designers had not yet perfected to look of human hands.