When odd reports are received through official channels stating that the President of the United States is being held captive on a secret international moon base called Vegan and that he has been replaced on Earth by a clone, the US Marshall Service immediately sends their 'best' man, Dix, on the mission.

With only three weeks left in his three-year contract, Sam Bell is eager to return to Earth. Stationed alone at a Moon-based facility with his computer assistant GERTY, an unexpected accident sets off a series of unsettling events that shake his isolation.

Humanity finds a mysterious object buried beneath the lunar surface and sets off to find its origins with the help of HAL 9000, the world's most advanced super computer.

At the turn of the century, all of the Earth's monsters have been rounded up and kept safely on Monsterland. Chaos erupts when a race of she-aliens known as the Kilaaks unleash the monsters across the world.

The most dangerous criminals in the universe escape from the Off-World Penitentiary and stow away to the quiet Moonbase Waste Disposal Plant. Hidden beneath the lunar surface lies an arsenal of nuclear warheads- the inmates' passport home to earth. Moonbase Commander John Russell launches a desperate fight to save his crew from a force capable of laying waste to an entire planet.

When meteors in a curious V-formation crash on a Cornwall field, an alien force possesses several scientists and infects bystanders with a deadly disease. Shielded from the meteor's influence by a metal plate in his head, Dr Curtis Temple discovers that an alien race on the moon seeks to use the manipulated geniuses for seemingly nefarious purposes. But, as he learns more about the invaders, they may not be as evil as initially thought.

In this science-fiction action opus, intergalactic extremist Alex Windham has seized control of Dome 4, a scientific outpost on another planet, after escaping from a penal colony on Mars. Windham is forcing the staff of Dome 4 to construct new weapons that he can use to destroy his enemies, but what he doesn't know is that one of his captives is the wife of interstellar lawman Chase Moran, and Mor

The spaceship AAB-Gamma is dispatched from FAFC headquarters in Japan to make a landing on the planet Mars and investigate reports of UFOs in the area. As they near the red planet, they encounter a mysterious UFO that coats the ship's hull with unusual spores. Taking one of the specimens back to earth, it soon develops and grows into a giant chicken-lizard-alien monster that tramples Japan.

After returning from a year-long Moon mission, Cassie, a NASA botanist, finds herself in a remote cabin in the woods, where her estranged twin sister, Stella, a former NASA architect, has found a new life with climate activist Bryan. Old wounds resurface as the sisters attempt to pick up the pieces of the rivalry that broke them apart.

After an atomic explosion blasts the Moon out of Earth orbit, Moonbase Alpha drifts in space, with 300 people on board. When a rescue team from Earth arrives in a faster-than-light space ship, everyone is overjoyed that they can now return to Earth. But Moonbase Commander John Koenig, having undergone an experimental brain soothing process after receiving a concussion in a crash on the Lunar surface, sees not friends from Earth but gruesome monsters which have telepathically caused all others on Alpha to see an illusion of an Earth party. The aliens are desperate for radiation and plan to manipulate the Alphans into detonating nuclear waste on the Lunar surface, reducing the Moon and everyone on it to dust. Koenig must expose this conspiracy to save his people. Compiled from the two part episode The Bringers Of Wonder from the TV series Space: 1999's second series.

In 1965, the space station JSS-3 is destroyed by a fleet of UFOs, which then begin a global siege on Earth, using rays to manipulate gravity and control the minds of men. In response, a global council meeting is held to determine the source of the attacks and prepare a rocket ship armada for a counter-attack, a true battle in outer space. . . The film is a sequel of sorts to Toho's THE MYSTERIANS in the reprise of the Etsuko Shiraishi character of that film as its heroine. It was edited to 74 minutes for its American release.

The Lunar Base Ark explores ore and unexpectedly is hit by a meteor shower and has severe damages. Colonel Gerard Brauchman sends the crewwoman Ava Cameron to repair a wing that is full of CO2. Dr. Lance Krauss warns that the gas may cause paranoia and hallucinations. Ava brings a sample of the meteor for analysis and Dr. Krauss finds that there are spores attached to the meteor. Ava accidentally cuts her finger in a sample but she hides the cut from the doctor. Soon Ava gets pregnant and delivers an alien offspring. However, neither Col. Brauchman nor Dr. Kraus believes in her words and they believe that Ava is delusional. The offspring bites the crewman Bruce Johns and the crew discovers that Bruce has been cloned by the alien. Soon they find how dangerous the clone is.