Reportedly, Leigh was disappointed with how Heart of Midnight turned out. She had done her customary extensive research for the project: meeting with women who had been abused as children, interviewing psychologists, attending crisis clinics, writing diaries and back-histories in Carol's voice, and likely felt disheartened when she saw the final product - something akin to a psychosexual haunted-house horror.
This film features a short stag film called "Apple Knockers and Coke," on a B&W television (at around 16 mins); which was sold to the director as supposedly starring Marilyn Monroe. However, the film stars 1954 Playboy model Arline Hunter, who had a slight resemblance to Monroe.
Actress Denise Dumont and director Matthew Chapman met on the set and married the year after the film release.
The location of the building used for "Midnight" can be narrowed down by an outdoors shot of the surrounding area. During an exterior scene, one can see the side of a nearby building prominently marked "Condon's" a department store with a location on King Street in Charleston, SC. Although much of the surrounding area indeed resembled a "rundown commercial district" in 1988, Condon's remained open until about 1999, years after this movie was shot. From King Street, the site of "Midnight" can be found. Although unsurprisingly renovated and re-purposed (by 2022) as a cafe, the building used as the Midnight can be recognized. Aside from its art deco styled facade, "Midnight" is still next door to a building with a distinctive crenelated roof, much as it was in 1988.
The building next door to The Midnight, with a facade reminiscent of a medieval castle, is, as of 2024, the home of the "Charleston Music Hall", but has a far longer legacy. Built during the mid-19th century, it originally served as a rail depot, then the offices of a company that wove fiber bags for the city's burgeoning cotton trade. The company closed during The Depression, and the building sat vacant for years, including the time in which this film was shot. The building was finally renovated as a live music and arts venue, and re-opened in 1995.