Alyn had earlier been the first screen Superman .
Blackhawk is a 15 - part 1952 film serial based on the comic book , produced by Sam Katzman and starring Kirk Alyn as Blackhawk .
Kirk Alyn had earlier been the first screen Superman .
Blackhawk is a 15 - part 1952 film serial based on the comic book , produced by Sam Katzman and starring Kirk Alyn as Blackhawk .