Best Science Fiction Movies of 1956

A 400-foot (122-meter) fire-breathing dinosaur, awakened from undersea hibernation off the Japanese coast by hydrogen-bomb testing, attacks Tokyo.

In a totalitarian future society, a man whose daily work is rewriting history tries to rebel by falling in love.

In 19th century England, a noted brain surgeon rescues a former student from being hanged on a false conviction for murder, and spirits him away to an ancient, repurposed abbey far in the countryside. There, he connives his pupil into assisting him in mapping the functions of the various parts of the human brain, using living subjects who are under a terrible animation-suspending drug called "black sleep". Subsequently, the student, along with the daughter of one of the subjects, discover that most of these subjects have survived but are being kept in a dungeon-like cellar, in various stages of physical and mental derangement...

Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.

The arrival in a small mountain town of a dissheveled stranger launches a series of murders committed by some sort of animal. As the town doctor and his daughter attempt to help the stranger, the sheriff investigates the murders; and they uncover a sinister experiment involving two rogue scientists, a car accident victim, his wife and children, and a serum that causes a man to turn into a ravaging werewolf.

Four astronauts returning from man's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war. At first unaware where they are, but finding the atmosphere safe to breathe, they start exploring and find themselves in a divided future where disfigured mutants living like cavemen inhabit the surface, while the normals live comfortably below the surface but are dying as a race from lack of natural water, air and sunlight.

The third film in The "Creature From The Black Lagoon" franchise sees the Gill Man turned into an air-breather by a mad scientist.

In a futuristic city, Detectives Monday and Tuesday pursue a wanted criminal.

A cosmic mix-up results in a Martian baby being delivered to Earth, while an Earth baby is sent to Mars. Joseph Wilbur and his wife try to raise the green-skinned, ingenious Martian tyke as if he were an Earthling. But the kid builds his own spaceship and flies away, and Wilbur must find him and bring him back, or he'll never be able to make an exchange with the Martian parents for his own boy.