Hidden Dangers

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

A criminal mastermind known as The Crimson Ghost is out to steal a device called the Cyclotrode, whi...

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

Story concerns a paper mill, a mortgage and the struggle to obtain the lost formula for making paper...

A 15-episode serial in which Beatty goes to darkest Africa to rescue the Goddess of Joba, who is bei...

A superhero known as The Black Commando battles Nazi agents who use explosive gases and artificial l...

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

Tarzan spurns the love of La, Queen of Opar. When he isn't trying to keep the Bolshevik Rokoff and C...

A 12-episode serial in which scholastic sports star Frank Merriwell leaves school to search for his...

The true story of Lord Francis Hope who inherits the Hope Diamond and marries showgirl May Yohe. Lor...

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

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

Two expeditions are trying to reach the Lost City of Zoloz -- one headed by Professor Davidson, a sc...

A police detective is caught up in a plot to steal two million dollars in bonds.

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

A Secret Service agent seeks his missing brother in Africa, and finds his mission complicated by ivo...

A story of the location of shipwrecked treasure (gold ingots) being hunted down by 4 children George...

Greedy traders have kidnapped a researcher, hoping he will reveal the location of a treasure in a hi...

Congo Bill is hired to locate an heiress lost somewhere in Africa.