Sci-fi horror from the 50's

A security agent investigates sabotage and murder at a secret underground laboratory, home of two experimental robots.

Scientists and American Air Force officials fend off a bloodthirsty alien organism while at a remote arctic outpost.

A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.

The earliest atomic tests in New Mexico cause common ants to mutate into giant man-eating monsters that threaten civilization.

A young boy learns that space aliens are taking over the minds of earthlings.

A scientist has a horrific accident when he tries to use his newly invented teleportation device.

An alien lifeform consumes everything in its path as it grows and grows.

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

After Scott Carey begins to shrink because of exposure to a combination of radiation and insecticide, medical science is powerless to help him.

As a mysterious planet hurls itself toward Earth, an enigmatic extraterrestrial scout arrives on a remote Scottish island with unknown intentions.

A small town in California is attacked by Martians, beginning a worldwide invasion.

Evil aliens attack Earth and set their terrible "Plan 9" into action. As the aliens resurrect the dead of the Earth, the lives of the living are in danger.

Global panic ensues when it is revealed that a mysterious UFO is actually a giant bird that flies at supersonic speed and has no regard for life or architecture.

Extraterrestrials traveling in high-tech flying saucers contact a scientist as part of a plan to enslave the inhabitants of Earth.

An alien lands in Washington, D.C. and tells the people of Earth that they must live peacefully or be destroyed as a danger to other planets.

A starship crew in the 23rd century goes to investigate the silence of a distant planet's colony, only to find just two survivors, a powerful robot, and the deadly secret of a lost civilization.

A spider escapes from an isolated Arizona desert laboratory experimenting in gigantism and grows to tremendous size as it wreaks havoc on the local inhabitants.

Professor Bernard Quatermass' manned rocket ship returns to Earth, but two of the astronauts are missing and the survivor seems ill and unable to communicate.

Professor Quatermass, trying to gather support for his Lunar colonisation project, is intrigued by mysterious traces that have been showing up.

A spaceship from another world crashes in the Arizona desert and only an amateur stargazer and a schoolteacher suspect alien influence when the local townsfolk begin to act strangely.

An astronaut is killed on reentry to Earth, but his body is seeded with rapidly gestating aliens.

The first U.S. spaceship to Venus crash-lands off the coast of Sicily on its return trip. A dangerous, lizard-like creature comes with it and quickly grows gigantic.

The inhabitants of a small Illinois town begin disappearing after a strange cone is found sticking out of the ground nearby.

A seaside community is terrorized by a hideous sea monster, which has been created by experiments in atomic radiation.

A party of archaeologists discovers the remnants of a mutant five-millennia-old Sumerian civilization living beneath a glacier atop a mountain in Mesopotamia.