A small group of cosmic explorers, including a woman, leaves Earth to start a new civilization. They do not realize that within themselves they carry the end of their own dream. They die one by one, while their children revert to a primitive native culture, creating new myths and a new god.

The first manned expedition to Mars is invaded by an unknown life form, which stows away on the rescue ship.

In the future, two slaves in a distant galaxy escape prison and crash-land on a strange planet. They meet Zed, whose hospitality attempts to hide the fact they are to be hunted for sport. Armed only with knives and their wits, the girls must battle their way across the jungle to a hidden arms cache before Zed catches and kills them.

A spaceship is sent to Mars after an alien distress signal is picked up. They find one survivor, but when a crew member is found drained of blood it's evident they have rescued a bloodsucking monster. Uses footage from Encounter in Space (1963).

After an asteroid draws an astronaut and his ship to its surface, he is miniaturized by the phantom planet's exotic atmosphere.

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.

Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for twenty years. They find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.

Aliens have landed and are hiding on Earth, but need Earth’s scientists to help them fight an inter-planetary war.

After a deadly explosion on their deep-space vessel, a young astronaut wakes up on an escape pod with no memory of how he got there or of the explosion. With limited knowledge, he must listen to the stories of those on board with him to piece together what really happened.

Wicket the Ewok and his friends agree to help two shipwrecked human children, Mace and Cindel, on a quest to find their parents.

When the first manned mission to Mars meets with a catastrophic and mysterious disaster after reporting an unidentified structure, a rescue mission is launched to investigate the tragedy and bring back any survivors.

A troubled psychologist is sent to investigate the crew of an isolated research station orbiting a bizarre planet.