 Rocket Man's raygun "appeared to be a German Luger (acceptable in this post-wartime serial) with a silvery cone propped over the barrel".The tidal wave in the serial's final chapter is actually stock footage taken from RKO's once-thought-lost science fiction feature film, "Deluge" (1933).Stock footage was being used for most of the chapters' cliffhanger endings, showing the "downward trend of late 1940s Republic serials".