Supergirl flies back to the big screen this summer (with a cameo from her cousin from Metropolis), and to celebrate we present an epic radio adventure of the Man of Steel. From the spring and summer of 1947, it's "Superman vs. Kryptonite," a story that begins when an old enemy of Superman's comes into possession of the hero's Achilles heel. We'll hear the first five parts of the story - episodes that originally aired on Mutual between May 14 and May 20, 1947.