construction site of the new factory, intending only to knock Colbert unconscious and rob him, but instead accidentally killing him. Tibbs arrives at the station to meet his train to go to Philadelphia, as Gillespie, having carried his suitcase, shakes Tibbs hand and bids him farewell. In the final interaction between Gillespie and Tibbs, as the detective ascends the stairs onto the train, for one last time Gillespie calls out to him and sincerely tells Tibbs "you take care...you hear?". Next, after a moment of hesitation, Tibbs turns around to face Gillespie and offers Gillespie a warm smile in reply. Gillespie then smiles back at Tibbs as Tibbs boards the train and as the train pulls away from the station finally bound for Philadelphia. Cast Cast notes: His unbilled appearance in this film was Clegg Hoyt's final acting role. He died two months after the film's release. Production Although the film was set in Sparta, Mississippi, most of the movie was filmed in Sparta, Illinois, where many of the film's landmarks can still be seen. 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. 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 scene of Tibbs slapping Endicott is not present in the novel. According to Poitier, the scene was almost not in the movie. 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." 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