Two women poison their blackmailing lover Andre and then haul the body away. They end up at the mansion of Tone Hobart, a demented scientist who believes that he's found a way to "tilt" time and bring the dead back to life.

A government assassin is given a unique assignment: undergo alien DNA grafts to "become" an alien, infiltrate their ship which crashed on Earth, and find out if they pose a threat.

Exposing a quasi-stellar sample to nuclear radiation opens a crack between universes, allowing entities from another dimension to enter this world, infuse the suits of the workers, disintegrate their bodies, and animate the suits. Now the beings intend to set off a nuclear explosion to widen the crack.

An alien race teleports away six square blocks of a city in the hopes that they can use the residents as slaves.

A mysterious tutor shows up at the apartment of a mentally-gifted boy and says that he's with the government, but the father soon realizes that things don't add up.

A crook and a divorced wife are abducted from Earth to participate in a battle of life and death against two aliens. The stakes: the winners' planet will be spared while the other is destroyed as entertainment for the aliens responsible for the game.

A drifter finds an old man dying by he side of the road and goes to a nearby house to seek help... and discovers that he and the guests can't leave.

Psychiatrist Evan Marshall is sent to investigate disturbing reports from an expeditionary team on a small planet.. and discovers that one of the team members has mutated into a radioactive humanoid whose touch is fatal and whose telepathy protects him from any attack.

A moonbase expedition takes in alien refugees who are faced with opponents of vastly superior power.

An alien from a doomed world converts an amusement park spaceship into a working model and abducts seven people to save his planet.

A five-man space station crew encounter an outer space plant... which spreads with amazing speed and emits poison spores that slowly kill the people that encounter them.

Four scientists have disappeared, and the Space Security Agency discovers that they all were born in a small town in Spider Country and are extraordinary physical and mental speciments... and a fifth man meeting the same criteria is still there and being held on a murder charge.

When Judith Bellero's father-in-law refuses to grant her scientist husband--Richard Jr.--control of his company, Judith sees a way to win Richard acclaim by murdering an alien that he accidentally summoned to Earth and claiming that Richard invented the protective shield device it wears.

Alien parasites plan the conquest of Earth by attaching themselves to the spinal columns of men in power. They recruit disaffected loners to spread their infection... unaware that one of the loners is a government agent sent to infiltrate them.

A swarm of bees transform its queen into a human female so that she can mate with an entomologist studying them and conquer the world.

In 1929, a local scientist delivers a mysterious present to newlyweds, with the note "Don't Open Till Doomsday" on it. The groom Harvey Jr. disappears shortly thereafter, and his bride Mary waits over 35 years until a new set of newlyweds comes along.

Two undercover Martians use a time-control device to analyze the quaint human custom of murder.

Life inmate Chino Rivera volunteers for a teleportation experiment as scientists make contact with an alien planet ten years away, and whose inhabitants want to exchange high-ranking officials ... once they exchange test subjects to make sure the teleportation process works.

Alien beings, the Zanti, send their criminals to Earth because they are morally opposed to killing them. They instruct the U.S.military not to approach the Zanti spacecraft... but a man and woman break through the cordon, risking the destruction of Earth.

In South America a U.S businessman and adventurer captures a humanoid ichthyosaur, and the local dictator plans to use it to bring tourists to the area. However, the creature--and a school of creatures like it--have plans of their own.

A scientist seeks to create a doorway between dimensions, and asks an industrial CEO to finance his experiments and provide the electrical power necessary.

An unstoppable and insatiable energy cloud is created at a physics center in California... and the director attempts to control it no matter the cost in human life.

In the war between the planets Ebon and Earth, the Ebonites capture several enemy prisoners and put them through a series of grotesque tortures to determine what they know.

After he's concussed in a lab accident, surgeon Paul Cameron hears two nearby rocks discussing their plans to conquer Earth.

A psychiatrist at a U.S. military base in Greenland uses an experimental procedure to explore the mind of an unstable soldier... and the two switch minds.

A senator conducts a hearing into a murder at a Military Department research center, and soon uncovers a conspiracy intended to demoralize humans and prepare them for alien invasion.

A mutant from a doomed future travels back in time to the present day, to stop the series of events that lead to his world. However, he falls in the love with the fiancee of the man he intends to kill.

A Welsh miner volunteers for an experiment to advance him 20,000 years up the evolutionary ladder.

A group of scientists choose one of their number to be surgically altered into an alien so that he'll scare the nations of the world into cooperating before the Doomsday Clock strikes midnight.

An Asian despot successfully infiltrates an imposter for an American Presidential candidate... and the imposter is elected President.

Engineer Allen Maxwell draws power from his brother's radio station to contact an alien explorer in a distant galaxy. However, when the transmission is overloaded, the Being is transported to Earth with disasterous results.