The Great Radium Mystery

A criminal mastermind known as The Crimson Ghost is out to steal a device called the Cyclotrode, which can short-circuit all electrical current on the planet.

A 12-episode serial in which scholastic sports star Frank Merriwell leaves school to search for his missing father. His adventures involve a mysterious inscription on a ring, buried treasure, kidnaping and Indian raids. He saves his father and returns to school just in time to win a decisive baseball game with his remarkable pitching and hitting.

A 15 episode serial in which Blake battles the "Scorpion" over possession of a 'death ray' machine.

Two safaris enter the African jungle intent on finding a white girl who is the heiress to a fortune. One safari, led by Jungle Jim, wants to make sure she gets the news that she is now a rich woman. The leaders of the other safari want to kill the girl so they can try to get hold of her inheritance.

When members of the nefarious crime syndicate KAOS attack the U.S. spy agency Control and the identities of secret agents are compromised, the Chief has to promote hapless but eager analyst Maxwell Smart to field agent. He is partnered with veteran and capable Agent 99, the only spy whose cover remains intact. Can they work together to thwart the evil world-domination plans of KAOS and its crafty operative?

A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle.

Treasury agents go after a ring of counterfeiters operating out of a traveling carnival.

A superhero known as The Black Commando battles Nazi agents who use explosive gases and artificial lightning to sabotage the war effort.

In a dystopian future, a totalitarian regime maintains peace by subduing the populace with a drug, and displays of emotion are punishable by death. A man in charge of enforcing the law rises to overthrow the system.

Tarzan spurns the love of La, Queen of Opar. When he isn't trying to keep the Bolshevik Rokoff and Clayton (pretender to the Greystoke estate) from reaching Opar, he is attacked simultaneously by two lions, dropped into a pit when a volcano splits the ground, nearly sacrificed by sun worshipers, and so on.

Columbia's 34th serial production starring Buster Crabbe, the Serial King himself

An Air Force captain is assigned to find some missing top-secret microfilm.

In time-honored fashion, a couple of supporting players -- George Dolenz and Bill Kennedy -- found themselves elevated to starring roles in this minor Universal serial. They played Royal Canadian Mounted Police officers investigating the murder of a miner. The story, of course, was less important than speed and action, which directors Ray Taylor and Lewis D. Collins delivered in typical slap-dash Universal style. Starlet Daun Kennedy did not make much of an impression as the imperiled leading lady, and former star Robert Armstrong (of King Kong fame) was wasted in a subordinate role. Rondo Hatton, a non-actor whose grotesque appearance (caused by acromegaly, the so-called "Elephant Man" disease) was tastelessly exploited by Universal in the '40s, appeared as one of the outlaws.

Alice Grayson's uncle develops a wireless torpedo that can be controlled by radio. After he announces his invention to several of his colleagues, two of them murder the scientist, steal the blueprints and prototype, and make plans to sell both to the highest bidder. When Alice discovers the identity of the thieves, the intrepid heroine, with the help of Bob Moore, her two-fisted boyfriend, desperately tries to recover the plans and torpedo before enemy countries can unleash the torpedoes against American ships. (IMDb)

Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth. Luckily, heroic young Flash Gordon is on hand to lead an investigative mission into outer space and onto the speedily approaching planet. There, he and his best girl, Dale, who is along for the ride, learn that Ming, the devious ruler of Mongo, has purposely put the planet on a collision course with Earth, and only Flash can stop him.

A 15-episode serial in which Beatty goes to darkest Africa to rescue the Goddess of Joba, who is being held by the high priest.

The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a prophecy that will enable him to conquer the world. His nemesi, Dr. Nayland Smith and his associates fight to keep the evil doctor from getting his hands on the keys. In 1943 the serial was edited together into a feature movie also called Drums of Fu Manchu.

A movie serial in 12 Chapters: US naval officer Don Winslow is given command of Tangita Island, near Pearl Harbor, where a ring of saboteurs is trying to destroy ships carrying supplies to the troops stationed in the islands and sabotage the war effort under orders from an unknown leader.

Advertising man Roger Thornhill is mistaken for a spy, triggering a deadly cross-country chase.

Columbia's 33rd serial (made between "Jack Armstrong" and "The Sea Hound") was based on the character that first appeared in "Action Comics" No. 42.