Strange visitor from another planet

Thank you, Austin public library, for the Superman shows. We started with the first series, in black and white. Of course, we didn't finish before the return date came and we haven't seen it on the shelf again, but those half-hour shows make wonderful viewing for tired people. Subsequently we found seasons three and four, in very cheesy color, new to us. We didn't get very far with these, either, but we certainly hope to find them again. Sterling Holloway is a recurring character, as an eccentric tinkerer or scientist, a sort of Gyro Gearloose. The Superman scripts vary wildly as to topic and treatment. There's an episode guide here (but beware of pop-ups).