Look, up in the sky! It's a bird! It's a plane! It's the start of another Superman summer! Our new season of bonus episodes starring the Man of Steel kicks off with a pair of serialized adventures. First, Clark Kent and Lois Lane investigate strange events in a small town in "Pillar of Fire at Graves' End" (originally aired between August 5 and August 9, 1940). Then, Clark joins an expedition to Central America in "The Mayan Treasure" (originally aired between August 12 and August 23, 1940).