Space: 1999

Earth's Moon has been ripped from its orbit by a massive nuclear explosion and cast adrift in unknown space. The more than 300 surviving personnel of Moonbase Alpha find that the drifting Moon on which they are situated has become locked on a collision course with the giant planet Astheria and then is pulled into the center of a black hole in space. The intervention of a higher power saves the Alphans from destruction in both instances.

After an atomic explosion blasts the Moon out of Earth orbit, Moonbase Alpha drifts in space, with three hundred 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 (Martin Landau), 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.

Earth's Moon is the site of Moonbase Alpha, a scientific research colony nestled in the crater Plato. Staffed by over 300 men and women from Earth, it is the operations center for several space expeditions. It is also a watchdog for vast amounts of atomic waste from Earth stored in silos on the Moon's far side. Magnetic radiation builds up and causes the wastes to explode with such force that the Earth's centripetal pull on the Moon is overcome, and the Moon is broken free of Earth's orbit to drift at incredible speed out of the Solar System off the plane of the ecliptic. The survivors on Moonbase Alpha are unable to return to Earth and must survive in unknown space on their wandering Moon. They encounter a planet whose advanced people project an illusion of a devastating attack on Moonbase.

Earth's Moon is ripped from orbit by a massive nuclear explosion and cast adrift in deep space. It is displaced further into the unknown by two space warps and into range of the volcanic planet Psychon, where the crew of Moonbase Alpha hope to obtain a mineral needed for their survival. But they are lured into a trap by Mentor of Psychon, who wants to drain their souls into a machine for energy needed to transform Psychon back to the paradise it once was. Mentor's daughter, Maya, who has the ability of personal molecular transformation, realizes how fanatical her father has become and helps the Alphans to stop her father. But in the struggle, Mentor's machine's power is released, triggering a series of explosions that cause cataclysm on Psychon and fevered distress in grief-stricken Maya. In the second part Koenig and Tony explore an alien ship while the moon passes through a space warp, leaving the astronauts stranded. Meanwhile, Maya is undergoing some strange disease that causes her to transform into a variety of berserker-like forms, including her deceased father Mentor.

After Gonzo receives messages from his breakfast cereal, he determines that he is an alien and tries to contact his alien brethren, but is captured by an overzealous secret government agency determined to prove the existence of extraterrestrial life. It's up to Kermit and the gang to rescue Gonzo and help reunite him with his long-lost family.