A couple vacationing in Morocco with their young son accidentally stumble upon an assassination plot. When the child is kidnapped to ensure their silence, they have to take matters into their own hands to save him.
A hapless carnival performer masquerades as the court jester as part of a plot against a usurper who has overthrown the rightful king of England.
Ventriloquist Jerry Morgan has failed with another love affair. The reason: when the relationship reaches the point when it is time to discuss marriage, his two dolls become mean and jealous. Morgan's dollmaker Papinek is a member of a spy ring who has stolen the secret plans for the top-secret Lafayette airplane. Since Morgan is leaving for Zurich the same night, he decides to hide the secret plan in the heads of the dolls.
In North Africa, German Field Marshal Rommel and his troops have successfully fended off British forces, and now intend to take Tobruk, an important port city. A ramshackle group of Australian reinforcements sent to combat the Germans is put under the command of British Captain MacRoberts. The unruly Aussies immediately clash with MacRoberts, a gruff, strict disciplinarian, however this unorthodox team must band together to protect Tobruk from the German forces.
After being unjustly accused of spying, a British officer tries to redeem himself in India.
The son of the notorious Dr. Henry Jekyll is determined to prove that his father's reputation has been unjustly deserved. He sets out to develop his father's formula in order to prove that he was a brilliant scientist rather than a murderous monster.
Astronauts blast off to explore the moon on Rocketship X-M or "Rocketship eXploration Moon". A spacecraft malfunction and some fuel miscalculations cause them to end up landing on Mars. On Mars, evidence of a once powerful civilization is found. The scientists determined that an atomic war destroyed most of the Martians. Those that survived reverted to a caveman like existence.
After the war, Matt Gordon returns to Singapore to retrieve a fortune in smuggled pearls. Arrived, he reminisces in flashback about his prewar fiancée, alluring Linda, and her disappearance during the Japanese attack. But now Linda resurfaces...with amnesia and married to rich planter Van Leyden. Meanwhile, sinister fence Mauribus schemes to get Matt's pearls.
Sophie loved Edmund, but he left town when her parents forced her to marry wealthy Octavius. Years later, Edmund returns with his son, William. Sophie's daughter, Marguerite, and William fall in love. Marguerite's sister, Marianne, also loves William. Timothy, a lowly carpenter, secretly loves Marianne. He kills a man in a fight, and Edmund helps him flee to New Zealand. William deserts inadvertently from the navy, and also flees in disgrace to New Zealand, where he and Timothy start a profitable business. One night, drunk, William writes Octavius, demanding his daughter's hand; but, being drunk, he asks for the wrong sister.
Architect Walter Craig, seeking the possibility of some work at a country farmhouse, soon finds himself once again stuck in his recurring nightmare. Dreading the end of the dream that he knows is coming, he must first listen to all the assembled guests' own bizarre tales.
At the height of World War II, the Germans discover that a certain British personage is to stay at the country house of Lord Buckley. They devise a plan whereby they will kidnap the real Lord Buckley, and send to England an actor who will masquerade, lie in wait for the visitor with a number of gunmen, and take him back to Germany.
In England, an eccentric police inspector, an earnest test pilot and a spunky female reporter team up to solve the mystery of a series of test aircraft which have disappeared without a trace while over the ocean on their maiden flights; unaware, as they are, that a spy ring has been shooting the planes down with a ray machine hidden aboard a salvage vessel which is on hand to haul the downed aircraft aboard, crews and all.