2001: A Space Odyssey is a 1968 epic science fiction film produced and directed by Stanley Kubrick, who co-wrote the screenplay with Arthur C. Clarke. Its plot was inspired by several short stories optioned from Clarke, primarily "The Sentinel" (1951) and "Encounter in the Dawn" (1953). The film stars Keir Dullea, Gary Lockwood, William Sylvester, and Douglas Rain, and follows a voyage by astronauts, scientists, and the sentient supercomputer HAL 9000 to Jupiter to investigate an alien monolith.