An American astronomer obtains images of Mars suggesting large-scale environmental changes are occurring at a pace that can only be accomplished by intelligent beings with advanced technology. At the same time a colleague claims to have been contacting Mars by radio, using technology stolen from the Nazis after World War II. He communicates first through an exchange of mathematical concepts, like the value of pi, and then through answers to specific questions about Martian life. The transmissions claim that Mars is a utopia fueled by nuclear power, which has led to great technological advancement and the elimination of scarcity, but that there is no fear of nuclear war.
Larry Martin (Judd Holdren), a leader in the Inter-Planetary Patrol, detects a rocket coming to Earth. He takes to the air in his rocket suit and helmet to investigate and discovers two Martian invaders, Marex (Lane Bradford) and Narab (Leonard Nimoy). Since Mars is now orbiting too far from the Sun and its ecology has been dying, the Martian invaders want to swap Earth's and Mars' orbits, so Mars will then be closer to the Sun. They plan on achieving this by using hydrogen bomb plans stolen from Earth scientists to cause the two planets' orbits to swap, using specifically placed atomic explosions on both worlds.
A great white hunter and an Indian princess trek into the Indian jungle to investigate a number of wild animal stampedes which have resulted in the deaths of many people. On their journey, they discover a herd of prehistoric wooly mammoths are responsible for the terror.
The film begins in a New York City bar, where the brooding, mysterious forecaster Mr. Ohman (Dan O'Herlihy) is sitting and drinking from a very large brandy glass. He gets into discussions with a cross-section of affluent Americans at the bar, including local television newscaster Vince Potter (Gerald Mohr), beautiful young New York society woman Carla Sanford (Peggie Castle), a Californian industrialist, a rancher from Arizona, and a Congressman. International news is bad, but these Americans do not want to hear it. While they all dislike Communism and appreciate the material wealth they enjoy, they also want lower taxes and don't see the need for industrial support of government. As he swishes the brandy around his snifter, Ohman tells the others that many Americans want safety and security, but do not want to make any sacrifices for it.
Une navette extraterrestre se pose et nous découvrons Marvin qui a pour mission de trouver et de capturer une créature terrestre : son lieutenant canin K-9 repère les traces de Bugs et mène Marvin au terrier du lapin. Ce dernier leur offre des bonbons (croyant que c'est Halloween) et le Martien excédé utilise son désintégrateur sur le terrier de Bugs ; le lapin fait mine de partir et endosse un déguisement de cuisinier qui annonce le départ de la navette, après avoir monté Marvin contre K9 ; bugs se fait capturer par ces derniers avec un bazooka à camisoles. Dans le vaisseau ; il neutralise K-9 en jouant au client de camisole de force puis Marvin en lui faisant croire que la navette s'écrase. Après une conduite périlleuse (une Lune, deux Planètes semblable à Jupiter et Saturne ,des étoiles s'attachent à la fusée martienne) observée par un astronome qui devient fou, Bugs revient sur Terre.
Pilot David Randall is paid to fly top-secret photographs from South African astronomer Dr. Emery Bronson to Dr. Cole Hendron in the United States. Hendron, with the assistance of his daughter Joyce, confirms their worst fears: Bronson has discovered a rogue star named Bellus that is on a collision course with Earth.
On a golden spring day at the bank of a tranquil river, a young 12-year-old girl named Alice grows bored listening to her older 19-year-old sister read aloud from a history book of William I of England. When her sister chastises Alice's daydreaming, Alice tells her kitten Dinah that she can live in a nonsensical magical land called Wonderland. While daydreaming, Alice spots a waistcoat-wearing White Rabbit passing by, exclaiming that he is "late for an important date". Alice gives chase and follows him into a rabbit hole, and falls into a large furnished hole. Her dress catches her fall like a parachute and she floats gently down. She sees the White Rabbit disappear into a tiny door and tries to follow, but the door's talking knob advises her to alter her size using a mysterious bottle marked "Drink Me." The contents shrink her to a fraction of her normal size, but the door is locked and the key is out of reach. She then takes a bite of a cookie that says “Eat Me” and grows large enough to fill the entire room. She begins to weep large tears that flood the room. The doorknob then tells Alice to drink from the bottle again, which causes her to shrink once more. Alice falls into the bottle and passes through the door's keyhole and into Wonderland. She meets several strange characters including the Dodo and Tweedledee and Tweedledum who recount the tale of "The Walrus and the Carpenter".
Roseanne Rogers (Susan Douglas Rubes) trudges from place to place, searching for another living human being. A newspaper headline reports a scientist's warning that detonating a new type of atomic bomb could cause the extinction of humanity.
A United States Air Force crew is dispatched by General Fogerty (David McMahon) from Anchorage, Alaska at the request of Dr. Carrington (Robert Cornthwaite), the chief scientist of a North Pole scientific outpost. They have evidence that an unknown flying craft crashed nearby, so Reporter Ned Scott (Douglas Spencer) tags along for the story.
In the prologue, Hoffmann is in the audience at a performance by Stella, a prima ballerina. Stella sends Hoffmann a note asking him to meet her after the performance, but the note is intercepted by his rival, Councillor Lindorf. Not having received her note, Hoffmann goes to the tavern in the interval, where he tells the story of a clown, Kleinzach and three stories of his past loves — Olympia, Giulietta and Antonia, and gets drunk.
Sidney Stratton, a brilliant young research chemist and former Cambridge scholarship recipient, has been dismissed from jobs at several textile mills in the north of England because of his demands for expensive facilities and his obsession with inventing an everlasting fibre. Whilst working as a labourer at the Birnley Mill, he accidentally becomes an unpaid researcher and invents an incredibly strong fibre which repels dirt and never wears out. From this fabric, a suit is made—which is brilliant white because it cannot absorb dye and slightly luminous because it includes radioactive elements.
When a flying saucer lands in Washington, D.C., the U. S. Army quickly encircles the spaceship. A humanoid (Michael Rennie) emerges, announcing that he has come in peace. As he advances, he unexpectedly opens a small cylindrical device and is shot by a nervous soldier who thinks it's a weapon. A tall robot emerges from the saucer and quickly disintegrates the army's deployed weapons with an energy ray. The alien orders the robot, Gort, to stop. He explains that the broken device was a gift for the President, which would have enabled him "to study life on the other planets".
With baseball's Pittsburgh Pirates in last place, their combative, foul-mouthed manager Guffy McGovern has plenty to complain about. All this changes when, while wandering through Forbes Field in search of his good luck charm one night, Guffy is accosted by the voice of an angel (voice of James Whitmore), who hints at having been a ballplayer during his earthly life.
Judd Holdren, in what was only his second starring screen role, plays Captain Video, the leader of a group of crime-fighters known as the Video Rangers. He faces an interplanetary menace, as the evil dictator of the planet Atoma, Vultura (Gene Roth) and his lackey, the traitorous earth scientist Dr. Tobor (George Eldredge) are planning to conquer the earth.
The first mission to Mars led by physicist Dr. Lane (John Litel), includes Professor Jackson (Richard Gaines), engineer Jim Barker (Arthur Franz) and his assistant Carol Stadwick (Virginia Huston). Journalist Steve Abbott (Cameron Mitchell) is also on board to cover the expedition. A final interview with the scientific team makes Steve realize that there are grave risks to the mission.