I wont give a summary of this serial as that has been done very well by some other reviewers. Just want to make a few observations. In this serial,"King of the Rocket Men," we see a gray car with a white top going over a cliff when it turns into an all white car. This same gray car with a white top becoming an all white car when it goes over a cliff can be seen in other serials. The use of stock footage was a staple in making serials as it reduced production costs. Another observation is that "henchmen" played more than one role. Here we wee David Sharpe killed off in one episode only to appear later as another henchman. Seeing this as a kid watching from week to week we didn't notice this as one henchman looked pretty much like another and we didn't know anything about stunt men. Another observation we can make as adults and didn't question as kids. We see this in several serials. The villain has a TV camera that can see anywhere he wants. There is a scene where the Vulcan can see our heroes in an apartment and hear every word they say. Why didn't he have his camera on them all the time and know all of their plans? All in all this is a pretty good serial,but not my favorite.