In the Heat of the Night is a 1967 American mystery drama film directed by Norman Jewison. It is based on John Ball's 1965 novel of the same name which tells the story of Virgil Tibbs, a black police detective from Philadelphia, who becomes involved in a murder investigation in a racist small town in Mississippi. It stars Sidney Poitier, Rod Steiger, and Warren Oates, and was produced by Walter Mirisch. The screenplay was by Stirling Silliphant.