Casting
Both Sidney Poitier and Rod Steiger were the first choices to play their roles. According to the AFI Catalog of Feature Films, the two were "old friends who had long sought an opportunity to work together."[4]
In the Heat of the Night was the film debut for several of its actors - Scott Wilson,[6] Anthony James, Quentin Dean, and Eldon Quick. Clegg Hoyt's unbilled appearance in this film was his final acting role. He died two months after the film's release.
Filming
Although the film was set in Sparta, Mississippi, most of the movie was filmed in Sparta, Illinois (no relation), where many of the town's landmarks can still be seen. The original novel was set in the (fictional) town of "Wells, Mississippi", but the name of the town was changed to Sparta so that the filmmakers could use the existing signage and storefronts.[4] The producers were unaware that "Sparta, Mississippi" was a real town, and the film's depiction bears little resemblance to the real community. For example, the film's Sparta is situated along Interstate 20, while the real town is nowhere near any interstate.
Jewison, Poitier, and Steiger worked together and got along well during the filming, but Jewison had problems with the Southern authorities, and Poitier had reservations about coming south of the Mason–Dixon line for filming. However, Despite their reservations, Jewison decided to shoot part of the film in Dyersburg and Union City, Tennessee anyway, while the rest was filmed in Sparta, Chester (Harvey Oberst chase scene), and Freeburg (Compton's diner), Illinois.
The film is important for being the first major Hollywood film in color that was lit with proper consideration for a Black person. Haskell Wexler recognized that standard strong lighting used in filming tended to produce too much glare on dark complexions and rendered the features indistinct. Accordingly, Wexler adjusted the lighting to feature Poitier with better photographic results.[7]
Slapping scene
The scene of Tibbs slapping Endicott is not present in the novel. According to Poitier, the scene was almost not in the movie, and it was he who had proposed the idea of Tibbs slapping Endicott back.[8] In the textbook Civil Rights and Race Relations in the USA, Poitier states: "I said, 'I'll tell you what, I'll make this movie for you if you give me your absolute guarantee when he slaps me I slap him right back and you guarantee that it will play in every version of this movie. I try not to do things that are against nature."[9] Mark Harris, in his book, Pictures at a Revolution, states that copies of the original draft of the screenplay clearly depict the scene as filmed, which has been confirmed by both Jewison and Silliphant. Nevertheless, Poitier is correct that Tibbs' slapping of Endicott was not originally envisioned. After Endicott's slap, Silliphant's initial step-outline reads: "Tibbs has all he can do to restrain himself. The butler drops his head, starts to pray. 'For him, Uncle Tom', Tibbs says furiously, 'not for me!'" Tibbs' counter slap first appears in Silliphant's revised step-outline.[10]
Tibbs urging the butler to pray for Endicott was part of Silliphant's adaptation of In the Heat of the Night as a subversive Christian allegory, featuring Tibbs as the messianic outsider who confronts the racist establishment of Sparta.[10]
