Look – up in the sky! It’s a bird. It’s a plane. No, it’s a bonus episode of “Down These Mean Streets” starring Superman and Batman. We're marking the release of Batman v. Superman - Dawn of Justice with a complete adventure from radio's The Adventures of Superman. Journey back to a time when the Man of Steel and the Caped Crusader fought evil instead of each other and enjoy the exciting conclusion of “Is There Another Superman?” – originally aired on Mutual from February 6 to February 14, 1946.