Calibos is a fictional character from the MGM film Clash of the Titans, release in 1981, and its main antagonist. Although the film was based on many elements from Greek Mythology, Calibos is not found in any of the Greek myths, though his presence does effectively bring stories together that otherwise would not have been associated with one another- being based on several unrelated myths. It has been said[who?] that Calibos was based on Caliban from "The Tempest" by William Shakespeare, perhaps because of his bestial appearance and deformity.