Action Comics (1938-) #315

“THE JUVENILE DELINQUENTS FROM SPACE!” Two boys from the faraway world Alpha Centauri cause trouble for the planet Earth and Superman with their super-scientific technology! “THE MENACE OF SUPERGIRL’S MOTHER!” Edna Danvers' continuing grief over her separation from Supergirl, and her resentment of Zor-El and Alura, is spurred to its limits!