Action Comics (1938-2011) #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!