John Baroda, a neo-Nazi and his alter ego, The Spy King and his aide Nitra, are part of a sabotaging team for a vast defense system of radar stations along the US borders. Radar Defense Bureau operative Chris Calvert comes to the rescue of radar scientist, Joan Hughes, who has been kidnapped by Baroda's henchmen...
Radar Patrol vs. Spy King was budgeted at $164,970 although the final negative cost was $164,632 (a $338, or 0.2%, under spend).[1] It was filmed between 20 September and 12 October 1949.[1] The serial's production number was 1706.[1]
Stunts
Tom Steele as Chris Calvert & Ricco Morgan (doubling Kirk Alyn & Anthony Warde)
Dale Van Sickel Chris Calvert, Ricco Morgan & Lt Manuel Agura (doubling Kirk Alyn, Anthony Warde and George J. Lewis)
David Sharpe as Lt Manuel Agura (doubling George J. Lewis)
Radar Patrol vs. Spy King's official release date is November 23, 1949, although this is actually the date the sixth chapter was made available to film exchanges.[1] This was followed by a re-release of Undersea Kingdom instead of a new serial. The next new serial, The Invisible Monster, followed in spring of 1950.[1]