The film is a melodrama with scientific speculation. Helius (Willy Fritsch) is an entrepreneur with an interest in space travel. He seeks out Professor Mannfeldt (Klaus Pohl), a visionary who has written a treatise on the likelihood of finding gold on the moon, only to be ridiculed by his peers. Helius recognizes the value of Mannfeldt's work, but a gang of evil businessmen have also taken an interest in Mannfeldt's theories.
In 1980, J-21 (John Garrick) sets his aircraft on "hover" mode in New York, lands and converses with the beautiful LN-18 (Maureen O'Sullivan). He describes how the marriage tribunal had refused to consider J-21's marital filing and applications, and LN-18 is going to be forced to marry the conceited and mean MT-3 (Kenneth Thomson). J-21 plans to visit LN-18 that night.
The Planet of Peril
The planet Mongo is on a collision course with Earth. Dr. Alexis Zarkov takes off in a rocket ship to Mongo, with Flash Gordon and Dale Arden as his assistants. They find that the planet is ruled by the cruel Emperor Ming, who lusts after Dale and sends Flash to fight in the arena. Ming's daughter, Princess Aura, tries to spare Flash's life.
The story begins with Buck Rogers (Buster Crabbe) and Buddy Wade (Jackie Moran) in the midst of a dirigible flight over the North Pole. They are caught in a savage storm and crash - but not before they release an experimental substance called Nirvano Gas that they hope will preserve them until rescue can arrive. The Nirvano Gas works, but the dirigible is buried in an avalanche and is not found until 500 years have passed. When Buck and Buddy are found, they awaken to a world ruled by the ruthless dictator, Killer Kane (Anthony Warde), and his army of "super-racketeers". Only those who live in the "Hidden City", run by the benevolent scientist Dr. Huer (C. Montague Shaw) and his military counterpart, Air Marshal Kragg (William Gould), resist the criminal rulers of Earth.
The film starts with colorful 1960s music by composer Anton Abril, accompanied by Marcello Giombini’s wordless song Seli (soprano by Edda Dell'Orso) and some psychedelic opening credits. The opening scene is some poorly duplicated stock footage of rockets blasting off and low budget special effects.
The first half of the film is historical and educational in nature, depicting mostly the life and scientific contributions of Konstantin Tsiolkovsky, along with the basic principles of rocket propulsion, ballistics, and Space Flight. It also depicts the contributions of Max Valier and Robert Goddard.
Une espèce de vampires extraterrestre vise à conquérir l'Univers. Un vaisseau terrien transporte une équipe spécialisée pour les combattre, composée d'Humains et d'un demi-vampire/demi-humain.
Professor Morbid Grimsby is an evil genius who has won the prestigious "Meanie" award six years in a row; to guarantee a seventh, he plots to eliminate all laughter by getting rid of the Sunday funnies, with the aid of his henchman Brutus.
A deadly plague is ravaging the Earth, known as the Purple Death because of the spot left on victims' foreheads. Ming the Merciless is suspected to be behind the plague and it is discovered that his spaceships have been dropping "Death Dust" in the Earth's atmosphere. Flash Gordon, along with Dr. Alexis Zarkov and Dale Arden, is sent to the planet Mongo to find a possible cure for the plague. They eventually find an antidote, called polarite in the Kingdom of Frigia. Flash and Zarkov distribute the antidote the same way the original Death Dust was spread. Ming sends an army of robot bombs after the three and he succeeds in capturing Zarkov for a short time before Flash frees him.
Four men and a woman blast into outer space from the White Sands Proving Ground aboard the RX-M (Rocketship Expedition-Moon) on humanity's first expedition to Luna. Halfway to their destination, the RX-M's engines shut down; the problem is resolved by recalculating the fuel mixture ratios and then moving around some of the propellent tanks and their connecting hoses. When the engines are reignited, the RX-M rapidly careens out of control, accidentally setting the spaceship on a runaway course heading beyond the Moon and into deep space. During this burst of rapid acceleration, the crew, one by one, becomes unconscious due to a drop in oxygen pressure. The engines are shut off just in time. At some later time, perhaps many days, they slowly come around. The revived crew soon discovers the RX-M has traveled some 50,000,000 miles while they were unconscious. Against all odds, this surprising sequence of events has put them on a direct course heading toward Mars. They also notice the RX-M's speed is still increasing, this time due to gravitational attraction: the Red Planet is drawing them in. They quickly calculate they are only 50,000 miles away. This forces Dr. Karl Eckstrom (John Emery) to "pause and observe respectfully while something infinitely greater assumes control.
War erupts between Earth and Mars after a manned mission to the Red Planet results in an attack on the city of the Mysterons. The World President is threatened with assassination but ultimately saved from a Mysteron reconstruction of Spectrum's top agent, Captain Scarlet, which is released from Mysteron control and re-enters Earth's service ("The Mysterons"). However, the Mysterons successfully assassinate the Director General of the United Asian Republic ("Winged Assassin").
An attempt to survey the Mysterons' planet, Mars, with a space probe is threatened when a scientist attached to the project is killed and duplicated by the Mysterons ("Shadow of Fear").