This was one of those shows that my local NBC affiliate used to pass off to a UHF channel, making it hard to find sometimes. Yet they aired Supertrain. Go figure. They really ticked me off for pre-empting Buck Rogers at the drop of a hat for local news programming too. There were some episodes I never saw until they aired in 80's syndication. Did all network affiliates wield this sort of power back then? I've read somewhere that "The Secret Empire" is actually a remake of the 1935 Gene Autry serial "The Phantom Empire".