Natural Enemies is a 1979 American drama film directed by Jeff Kanew based on the 1975 novel Natural Enemies written by Julius Horwitz. The film stars Hal Holbrook and Louise Fletcher as a married couple whose relationship is strained and threatened by the husband's interest in getting rid of his wife, including resorting to murder. The man, Paul (Hal Holbrook) ultimately hires five hookers to fulfill a final fantasy before killing himself and his family.