Here's the trailer of the serial I'm currently watching. It was probably the first or second serial I ever saw, back on KWGN Channel 2's Command Performance Theater, which aired a chapter every Sunday night at 10 PM. Needless to say, I didn't see ALL the chapters.
This is the second "Rocketman" serial, preceded by "King of the Rocketmen" and followed by "Zombies of the Stratosphere". I like all of them, but since this one was the first I saw, it's my favorite.