and Max von Sydow, and A Patch of Blue (1965) co-starring Elizabeth Hartman and Shelley Winters. In 1967, he was the most successful draw at the box office, the commercial peak of his career, with three popular films, To Sir, with Love, and In the Heat of the Night, and Guess Who's Coming to Dinner. Although these three films seemingly shared little similarity, they all, albeit not overtly, dealt with the black and white divide. In To Sir, with Love, Poitier plays a teacher at a secondary school in the East End of London. The film deals with social and racial issues in the inner city school. The film was met with mixed response; however, Poitier was praised for his performance, with the critic from Time writing, "Even the weak moments are saved by Poitier, who invests his role with a subtle warmth." In Norman Jewison's mystery drama In the Heat of the Night, Poitier played Virgil Tibbs, a police detective from Philadelphia who investigates a murder in the deep south in Mississippi alongside a cop with racial prejudices played by Rod Steiger. The film was a critical success with Bosley Crowther of The New York Times calling it "the most powerful film I have seen in a long time." Roger Ebert placed it at number ten on his top ten list of 1967 films. Art Murphy of Variety felt that the excellent Poitier and outstanding Steiger performances overcame noteworthy flaws, including an uneven script. Poitier received a Golden Globe Award and British Academy Film Award nomination for his performance. In Stanley Kramer's social drama Guess Who's Coming to Dinner, Poitier played a man in a relationship with a White woman played by Katharine Houghton. The film revolves around her bringing him to meet with her parents played by Katharine Hepburn and Spencer Tracy. The film was one of the rare films at the time to depict an interracial romance in a positive light, as interracial marriage historically had been illegal in most states of the United States. It was still illegal in 17 states—mostly Southern states—until June 12, 1967, six months before the film was released. The film was a critical and financial success. In his film review, Roger Ebert described Poitier's character as "a noble, rich, intelligent, handsome, ethical medical expert" and that the film "is a magnificent piece of entertainment. It will make you laugh and may