Divided into four clearly separate acts, “2001: A Space Odyssey” deals with subjects such as artificial intelligence, human evolution, extraterrestrial life and technology. It was partly based on a short story “Sentinel” by Arthur C. Clarke, and the movie script was a joint effort between Clarke and the director Stanley Kubrick.
The first “act” follows a tribe of early humanoids who, after the appearance of a mysterious black monolith experience a rapid increase of intellectual capacities. The second act moves forward into the future and tells the tale of a covert space mission studying another monolith on the Moon, identical to the one seen in the first act. The third act unfolds a year and a half after the said lunar mission on a spacecraft destined for Jupiter. On the spacecraft are two scientists, three additional “hibernating” scientists, and a talking compute HAL 9000. “Hal”, as the computer is called by the scientists begins to display suspicious behavior, even though it is only a computer. When the two awake scientists hatch a plan to disconnect Hal if the suspicions about his flawed behavior are proven to be true, Hal uses the computer commands to try and kill the crew members, since their own behavior “jeopardizes the mission”. One of the scientists manages to survive and disconnect Hal. Upon the disconnection, a pre-recorded message from one of the scientists from the lunar mission is played, regarding the monolith of the moon and the radio frequency it is emitting towards Jupiter. In the fourth and final act the surviving scientist reaches Jupiter. He leaves the spacecraft and gets sucked into a tunnel of shining lights, and we see him traveling across the universe, witnessing strange phenomena of the universe, before seeing himself in various points of his life, both past and future. Ultimately, he is transformed into a baby floating in a transparent orb just outside of the Earth, watching over it.