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.

Japanese spies attempt to subvert America's war effort; G-Men attempt to thwart their plot.

Elmo finds himself in 18 different hair raising and dangerous adventures always escaping in the nick...

Mr. Lincoln's tremendous physique fits him especially for serial work, where strength and daring are...

Rosalind Joy is a constantly imperiled heiress to a fortune in gold. An 18 part adventure serial

The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the go...

The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a...

A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he h...

A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret...

In Africa, a deceased medical missionary's daughter in Africa carries on her father's work. Before l...

Richard Grant, imprisoned in India for a crime he did not commit, escapes and makes his way to Afric...

A lady reporter and two college students search for the "Gold Special," a train that disappeared wit...

A wealthy young athlete comes to the aid of a beautiful heiress, whose fortune is being threatened b...

The Perils of Pauline is a motion picture serial shown in weekly installments featuring the actress ...

A gang of land-grabbers tries to prevent safe passage of the Foster Stage Company through frontier t...

Prof. Millard pretends to be dead and helps Jeff King ferret out Vulcan, the evil traitor at the sci...

It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end ...

Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth....