The Secret Kingdom

A faithless K.C.'s wife elopes with his opponent in a slum murder trial.

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.

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

Prior to the United States' involvement in World War II, the masked vigilante Spy Smasher fights Nazi agents operating within the US, led by the...

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

A criminologist and a government agent team up to expose a ring of German spies.

The obsessive scientist Dr. Miller is working on a matter-transmitter invention called the Paratron; a conspiratorial team of spies and no-goods...

A newspaperwoman finds trouble aplenty when an Inca tribe believes her to be the reincarnation of their long-lost princess.

Nick, the "swing" man in a trapeze troupe, loves Greta Nelson, the girl in the act; and Tony, the "flyer," incurs his enmity as Greta seems to favor...

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

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

Beatrice Fairfax, the original advice-to-the-lovelorn reporter and her friend and not-so-secret admirer Jimmy Barton investigate calls for help and...