A space expedition to Uranus is menaced by a giant brain that can make illusions come true.
Spies discover that the Red Chinese have built a "doomsday machine" capable of destroying the surface of the Earth, and that they plan to use it within a matter of days. Meanwhile, Project Astra, a manned U.S. space mission to Venus, is in its final hours before launch when it is taken over by the military and nearly half of its all-male crew is replaced by women. The reason for this becomes apparent when, shortly after Astra leaves orbit, the Earth is completely destroyed in a global cataclysm! Is the human race doomed? What dangers and wonders await the crew of the Astra on their journey to Venus?
A group of twelve international scientists are the first to land on the moon. In their exploration of the surface, they run into all kinds of trouble, including threatening messages from alien life forms residing on the moon. Just a short nine years before the historic moon landing, this film's understanding of the science of space exploration is fantastically simplistic, but this well-made science fiction film holds interest with a strong cast and intriguingly strange events, photographed with great style by John Alton. Ken Clark, Michi Kobi, Tom Conway, John Wengraf, and Robert Montgomery Jr. portray the intrepid scientists.
On its way back to Earth, the space shuttle Nautilus passes through a cloud of alien spores causing its sole occupant, astronaut Steve Thomas to transform into a blood-thirsty monster. The shuttle crashes into a swampy region of central Florida, creating a situation which threatens contagion and/or death to all who encounter the shuttle or its mutated pilot.