Mystery of the Riverboat

Dr. Ernst Grood , having already dominated the planet Ergro, now intends to take over the control of the Earth. Unfortunately for him, reporters...

Claire Forrest seeks her kidnapped scientist father, hidden somewhere on Mystery Island. He is held and forced to work on diabolical inventions by...

Two British officers are assigned to collect information to convict Captain Kidd of piracy.

Beyond Hell's Gate Pass is territory controlled by a man who calls himself King Carter; he uses a variety of schemes to prevent the railroad from...

An expedition arrives on an uncharted jungle island to rescue the local natives, led by a jungle boy, from a volcano that is about to erupt.

Jerry Blake (aka Federal Operator 99) teams-up with Joyce Kingston to thwart the plans of escaped crime boss Jim Belmont.

Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is...

A young girl journeys to Africa to find her father, an explorer who vanished in the jungle.

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

Dick Tracy goes up against a villain known as The Ghost, who can turn himself invisible.

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,...

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