I was just searching around Y/T and ended up watching a few episodes of this series. I had never even heard of this title before and it took a little research to figure out what Coronado 9 even meant. (the only lime I ever heard the name Coronado was that he was one of the Conquistadores who searched for the fabled, 7 Lost Cities of Gold). As I watched more and more I realized the extensive use of rear-projection in many of the scenes. In other words, they hardly ever left the studio and relied on visual tricks so we would believe we were on location for the stories. A couple of the episodes were great, but the others I watched were totally uninspiring. This series never played in my area in 1960, so I missed it entirely. (those were in the days when we had only 2 or 3 channels). Watch it now and enjoy.