James Houghland, inventor of a new method by which television signals can be instantaneously sent anywhere in the world, refuses to sell the process to television companies, who then send agents to acquire the invention any way they can. On the night of his initial broadcast Houghland is mysteriously murdered in the middle of his demonstration and it falls to Police Chief Nelson to determine who the murderer is from the many suspects present.
Eccentric tycoon Jasper Whyte hosts a dinner at his mansion and announces that he will divide his money and give each guest a million dollars before the stroke of midnight. When his long-lost granddaughter suddenly arrives, Whyte changes his mind and proclaims that she will receive his entire fortune. A second lady appears at the estate, claiming that she is actually Whyte's granddaughter, Doris Waverly, and the first woman is found murdered in her room! With each guest possessing a motive, the mystery of the killer's identity briskly unfolds through a stirring series of surprises.
When the ancient continent of Mu sank beneath the ocean, some of its inhabitant survived in caverns beneath the sea. Cowboy singer Gene Autry stumbles upon the civilization, now buried beneath his own Radio Ranch. The Muranians have developed technology and weaponry such as television and ray guns. Their rich supply of radium draws unscrupulous speculators from the surface. The peaceful civilization of the Muranians is corrupted by the greed from above, and it becomes Autry's task to prevent all-out war, ideally without disrupting his regular radio show.
A doctor who has spent his career working on ways to revive the dead sees his chance to prove his theory by performing his procedures on a recently deceased dog.
Clyde Beatty, an animal trainer and circus star, leads a search for his missing girlfriend and her father who were on an expedition looking for a lost tropical island. Using a dirigible as his mode of transportation, Beatty and his band head off in search of the missing explorers only to crash their airship on the same island their friends are located. Battling wild animals and a gang of greedy men searching for gold, Beatty and his party must rescue his girlfriend and father all the while trying to escape their jungle island. Feature version of the same-title serial of the same year, with refilmed sequences substantially altering the plot and characters of the original chapterplay.
A massive earthquake strikes the United States, which destroys the West Coast and unleashes a massive flood that threatens to destroy the East Coast as well.
The villainous Dr. Fu Manchu races against a team of Englishmen to find the tomb of Ghengis Khan, because he wants to use the relics to cause an uprising in the East to wipe out the white race.
New York, 1980: airplanes have replaced cars, numbers have replaced names, pills have replaced food, government-arranged marriages have replaced love, and test tube babies have replaced ... well, you get the idea. Scientists revive a man struck by lightning in 1930; he is rechristened "Single O". He is befriended by J-21, who can't marry the girl of his dreams because he isn't "distinguished" enough -- until he is chosen for a 4-month expedition to Mars by a renegade scientist. The Mars J-21, his friend, and stowaway Single O visit is full of scantily clad women doing Busby Berkeley-style dance numbers and worshiping a fat middle-aged man.
A scientist discovers that there's gold on the moon. He builds a rocket to fly there, but there's too much rivalry among the crew to have a successful expedition.
On a volcanic island near the Kingdom of Hetvia rules Count Dakkar, a benevolent leader and scientist who has eliminated class distinction among the island's inhabitants. Dakkar, his sister Sonia and her fiance, engineer Nicolai Roget have designed a submarine which Roget pilots on its initial voyage just before the island is overrun by Baron Falon, despotic ruler of Hetvia. Falon sets out after Roget in a second submarine and the two craft, diving to the ocean's floor, discover a strange land populated by dragons, giant squid and an eerie undiscovered humanoid race.
In a futuristic city sharply divided between the rich and the poor, the son of the city's mastermind meets a prophet who predicts the coming of a savior to mediate their differences.
A famous singer Claire Lescot, who lives on the outskirts of Paris, is courted by many men, including a maharajah, Djorah de Nopur, and a young Swedish scientist, Einar Norsen. At her lavish parties she enjoys their amorous attentions but she remains emotionally aloof and heartlessly taunts them. When she is told that Norsen has killed himself because of her, she shows no feelings. At her next concert she is booed by an audience outraged at her coldness and she decides to visit the vault in which Norsen's body lies.
A young man travels to Mars in a rocket ship, where he leads a popular uprising against the ruling group with the support of Queen Aelita, who has fallen in love with him after watching him through a telescope.
A Manhattan playboy falls for a mysterious European woman, whom he notices is an exact double for a famous socialite who disappeared at the turn of the century. At first he thinks it's just a coincidence, as the beautiful young woman he's romancing is much younger than the woman who vanished, who would be in her late 50s or early 60s by now. Soon, however, he begins to believe that maybe it's not such a coincidence after all.
The story begins with a scientist creating a device shaped like a man that can be remote-controlled by a machine. The mechanical man possess super-human speed and strength. The scientist is killed however by a gang of criminals, led by a woman named Mado, who wish to get the instructions for building the mechanical man. The criminals are captured before they are able to get them and are brought to trial and condemned. Mado manages to escape and kidnaps the scientist's niece whom she forces to give her the instructions which she uses to build a mechanical man.