It suffers from budgetary restraints. For example, there is no heroine, the various hide-outs are all laid out to look the same (a fact that the story never explains), there is basically only one airplane in evidence (each Blackhawk had his own plane in the comic), and Blackhawk's gang is "economy size" in comparison to the comic. Notwithstanding, the serial as directed by Spencer Bennet and Fred Sears, remains a fast-paced action packed adventure.
Heading the cast is Kirk (don't call me Superman) Alyn as Blackhawk, and the lovely Carol Forman (my favorite serial villainess) in another of her ice cold no nonsense portrayals. In the supporting cast are a number of "B" movie veterans. John Crawford, Rick Vallin (in a dual role) and Don Harvey are members of the Blackhawks and Marshall Reed, Zon Murray, Michael Fox, Pierce Lyden and Rory Mallison (unusually sadistic) are on the wrong side of the law.
The story involves the efforts of an unnamed foreign power seeking to steal a secret fuel cylinder from the U.S. for their own use and the Blackhawks efforts to thwart them. As is the case in most serials, the fuel cylinder changes hands back and forth several times over the course of the 15 chapters.
Sadly the era of serials was drawing to a close when "Blackhawk" was produced, and for Alyn and Forman this was to be their last serial. At any rate, "Blackhawk" remains one of the best of the latter day serials.