In 1979, NBC produced a TV series called “Supertrain,” in which every episode took place on a nuclear-powered luxury locomotive with its own discotheque. I swear this is true. “Supertrain” was the most expensive TV show in history, with the trains alone costing $10 million — which, adjusted for inflation, would be nearly $50 million today. I swear this is true. “Supertrain” was canceled after only nine episodes and, combined with the United States boycott of the 1980 Olympics, nearly bankrupted NBC.