It is interesting to note that three of the main actors from the show utter the famous lines "Look, up in the sky!" "It's a bird!" "It's a plane!". They are actors Robert Shayne, who played Inspector Henderson, George Reeves himself (Superman/Kent) and Phyllis Coates, who played Lois Lane. The actors just happened to be in the studio when the recording was being made, so they were used.