Radar Men from the Moon (1952)

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!