When Marla Grayson is on the phone with Sam Rice, he asks her if she has heard of the Milgram experiment, which references a series of social psychology experiments conducted by Stanley Milgram where subjects obeyed authority figures (i.e. giving electric shocks to people) regardless of possible consequences.
While promoting the film, actress Eiza González alluded to the Free Britney movement as shown in Hulu's Framing Britney Spears (2021) documentary just few weeks earlier than its release. She stated: "Conservatorships is a subject we don't hear much about and the intention of this film is to shed light on how a systemically complex built business sometimes preys on innocent and or disabled people, meanwhile addressing other very crucial social commentary in a cheeky way."
Rosamund Pike used the same hairdresser she worked with on Gone Girl (2014) to create Marla's severe bob.
The underwater sequence took two days to film in a tank.