Letters from Erika Kreismann, Robert French, W. H. Piper, Martin Lieder, Ann May Wald, Fortune Esposito, Billy Moore, Walter Gallun, Ellen Gary, Casper Schwartz.
While Superman is on a mission in the past, the Superman Emergency Squad monitors Metropolis and discovers that Supergirl has accidentally left a clue to her existence and the Superman Emergency Squad jumps into action to remove the evidence of Supergirl's existence.