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".
Rustlers of Red Dog
1935
8
The Red Glove
1919
0
The Girl and the Game
1915
0
The Adventures of Smilin' Jack
1943
5
Daughter of Don Q
1946
0
Drums of Fu Manchu
1940
6
Flash Gordon
1936
6
The Timber Queen
1922
0
Mysterious Island
1951
5
The Brass Bullet
1918
0
King of the Wild
1931
3
Into the Net
1924
0
King of the Royal Mounted
1940
6
Pirates of the High Seas
1950
6
The Trail of the Octopus
1919
5
G-men vs. the Black Dragon
1943
5
The Lightning Raider
1919
0
King of the Circus
1920
0
Perils of Nyoka
1942
0
Elmo the Fearless
1920
0