possibly the first or second serial I ever tried to watch all the episodes of as a kid. they were shown each Sunday night, which made it problematic back then, as it was a "school" night.
I didn't know Commando Cody was the second person to wear the rocket suit, either. I just know the suit was cool and there was a ton of action in the chapters. now it's fun to see Clayton Moore as a henchman for the villainous Krog.
this has fallen into the public domain, and there are several versions out on DVD. I recommend this one!