Madisen Beaty, who played Patty Krenwinkel in Aquarius, reprised the same role in Quentin Tarantino's 2019 film Once Upon a Time in Hollywood.

Series creator John McNamara described Aquarius as 'historical fiction,' deliberately blending real-life figures like Charles Manson with fictional characters and storylines set in 1967 Los Angeles.

NBC published a companion blog to provide historical context for the real events and figures dramatized in the series.

Every episode is named after an iconic 1960s song, with some tracks directly associated with the Manson Family.

All of Season 2's episode titles are taken from tracks on The Beatles' 'White Album,' reflecting Charles Manson's real-life obsession with that album.

Although rated TV-14 for its NBC broadcast, an unrated version of the series with more explicit content was released on DVD.

The show was initially envisioned by its creator as a six-season series, but it was cancelled by NBC after only two seasons due to low ratings.

NBC made all 13 episodes of Season 1 available for streaming on its website, mobile app, and Hulu for four weeks immediately after the premiere, even while still airing episodes weekly on regular television.

A series of four short webisodes titled 'The Summer of Love,' set in San Francisco in 1967, was produced showing Charlie gathering his first followers Mary, Katie, and Sadie before the events of Season 1.