At the Dawn of Man, a group of hominids encounters a mysterious black monolith that is alien to their surroundings. A hominid discovers the first weapon, using a bone to kill prey. The bone is tossed in the air and it's a 21st century spacecraft hovering over the Earth, skipping ahead millions of years in technological development only to imply that man hasn't advanced very far at all psychologically. U.S. scientist Dr. Heywood Floyd travels to the...

As a team of United Nations astronauts prepares for a moon mission, they are confused by a man who claims he, his fiancée and a scientist journeyed to the moon 65 years ago and were attacked by grotesque, human-like forms that live in immense crystal caverns.

Astronaut Sam Bell is completing a three-year contract with Lunar Industries to mine Earth's primary source of energy on the dark side of the moon: Helium-3. His declining health is causing headaches and hallucinations that lead to a near-fatal accident, rendering him unconscious. After recuperating, an unexpected discovery leads him to doubt his sanity, his identity, and the integrity of the company. Believing he is alone on his mission, his sole...

American astronaut Captain Charles T. Baker thinks he is the first person to set foot on Planet 51. Little does he know the planet is inhabited by little green people who live in a cheerful innocent world. The only fear they have is that their planet will be overtaken by alien invaders from planet Earth. Now, before he becomes part of the Planet 51 Alien Invaders Space Museum, Captain Baker, with the help of his new friend, Lem, must figure out a...