Bicameralism is a hypothesis in psychology that argues that the human mind once assumed a state in which cognitive functions were divided between one part of the brain which appears to be "speaking", and a second part which listens and obeys. The term was coined by Julian Jaynes, who presented the idea in his 1976 book The Origin of Consciousness.
At 1 hour 30 minutes, this episode is longer than the original film, Westworld (1973), which clocks in at 1 hour 28 minutes.
The music being played by the player piano during Ford's final speech is an instrumental rendition of Radiohead's "Exit Music (For A Film)". It is at least the fourth instance of an instrumental rendition of a Radiohead song being used in the series, the others being "No Surprises" in Chestnut (2016), and "Fake Plastic Trees" and "Motion Picture Soundtrack", both of which are in The Adversary (2016).
The episode won 2 Emmy Awards for Outstanding Sound Mixing for a Comedy or Drama Series (One Hour) and Outstanding Special Visual Effects.
The ending was filmed on a cold spring evening at Paramount Ranch in April 2016, with approximately 300 people on set.