The war lords of a potential enemy of the US has the spy ring, led by John Baroda, the Spy King and his aide Nitra, sabotaging the plans for a vast defense system of radar stations along the American borders. Radar Defense Bureau operative Chris Calvert comes to the rescue of a brilliant radar scientist, Joan Hughes, who has been kidnapped by Baroda henchmen in chapter 1 ("The Fatal Fog"), and the two battle together before putting an end to the Spy King in the aptly-named chapter 12, "Day of Reckoning".

Commando Cody, 'Sky Marshal of the Universe', works with American scientists Joan Gilbert and Ted Ri...

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

A movie serial in 12 chapters: After gold is discovered in the town of Nugget, the titular band of ...

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...

Adventures of an American Secret Service-girl in search of an important German secret during the war...

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker w...

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

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

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

Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, ...

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

When the unscrupulous Carlos Manning discovers that an old Spanish land grant recently unearthed wil...

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

A villain named Marlof attempts to set up secret missile bases inside Canada so he can launch missil...

Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden ...

The female leader of an international crime ring steals a valuable artifact that can give her the po...

Two federal agents battle a gang that hijacks trucks carrying materials vital for the security of th...

The Daily Clarion hires detective story writer Steve Colt to investigate the deaths of a group of sc...

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