During musical therapy Alice (Olivia Dudley) suggests the song "Helter Skelter" by the Beatles, which was one of Charles Manson's inspirations for the Tate/ LaBianca murders committed by the Manson family. The Manson murders were in turn the basis for the show Aquarius, which Olivia Dudley is also in.
In this episode Quentin channels Taylor Swift by singing her "Shake it off".