- HD 1080
- Runtime: 167m.
- Status: Released
0
- Languages: en
- Country: United States of America
- Director: Fred C. Brannon
- Stars: Kirk Alyn, Jean Dean, Anthony Warde, George J. Lewis, Eve Whitney
- keywords: movie serial
- Production_studio: Republic Pictures
- Slogan: ONE THRILL AFTER ANOTHER!
- The Radar Patrol vs. Spy King is featured in the top rankings of 1949
- #18 in Top Action Movies of 1949
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".