Daniel Robin has become mixed up with a band of criminals known as "the 13," and is shot when he refuses to do their bidding. His daughter Ruth, brought home from boarding school, reaches his bedside before he expires. He tells her that she will be given thirteen keys. Instructions will be provided with each key and, if she follows the instructions, she will eventually fully learn of her birthright. Many adventures then follow as Ruth attempts to solve the puzzle of each key and establish her true birthright.
Buffalo Bill Cody battles a gang of outlaws secretly headed by an unscrupulous lawyer.
A new town doctor arrives at the same time as local Indians needprotection from troublemaking looter...
Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth....
The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a...
The evil and masked "Gargoyle" is sabotaging all of America's industrial plants. It is up to the Spi...
Prospector Henry Tolliver disappears and his son "Wild Bill" Tolliver comes looking for him.
A bunch of waterfront youths pursue the Sea Raiders, a gang of saboteurs.
A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret...
It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end ...
The Perils of Pauline is a motion picture serial shown in weekly installments featuring the actress ...
The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the go...
Professor Campbell's expedition into the hills of Libya obtains a papyrus which might reveal the hid...
A gang of land-grabbers tries to prevent safe passage of the Foster Stage Company through frontier t...
Commando Cody, 'Sky Marshal of the Universe', works with American scientists Joan Gilbert and Ted Ri...
Madge Clayton, a society girl, mysteriously disappears. The police suspect a master criminal is behi...
In this 12 Chapter serial the UN enlists trader Tom Rogers and Vivian Wells, to lead the effort to p...
A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an ar...
A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he h...
Japanese spies attempt to subvert America's war effort; G-Men attempt to thwart their plot.