Blackhawk (1952) is a Columbia movie serial based on the comic book Blackhawk 
now owned by DC Comics. 
The serial's subtitle was "Fearless Champion of Freedom". 
It was the studio's 49th serial. 
It stars Kirk Alyn as Blackhawk and Carol Forman as the foreign spy whom the 
Blackhawks must prevent from stealing the experimental super-fuel "Element-X". 
Alyn and Forman were also the hero and villain, respectively, of Columbia's earlier 
Superman. 
This serial was produced by the famously cheap Sam Katzman and directed by the team 
of Spencer Gordon Bennet and Fred F. Sears. 
It is considered a relatively cheap and lacklustre serial, produced in the waning 
years of the serial medium