Saturday Morning Sci-Fi

I frankly don't remember seeing this serial, called Phantom Empire, but it was one of the first sci-fi serials to air on early 1950s TV, possibly even before. It's worth noting because it starred Gene Autry--I guess that's him with the thunderbolt on his chest. The same Gene Autry who we would know as the Singing Cowboy in numerous western shorts and movies aired very early Saturday mornings, along with the likes of Tex Ritter and sometimes even Roy Rogers. But apparently before he was back in the saddle again, he was fighting outlaws from space.