The film deviates extensively from the book, for example in that Captain Willard is not sent to investigate, but to kill, and that Col. Kurtz does not die a natural though mysterious death; also Marlow is sent here to Cambodia, not the [African Congo]?.
Due to typhoons, nervous breakdowns, heart attacks, and a temperamental director, the film went grievously overbudget and overschedule. The original version was severely edited, causing some of the symbolism to be lost; Coppola re-released the film in 2001, featuring over an hour of restored footage. For background information on the film, see [Eleanor Coppola]?s documentary, [Hearts of Darkness: A Filmmaker's Apocalypse]?, released in 1991.