Action Comics #339

MUTO VERSUS THE MAN OF TOMORROW! / BRAINIAC'S BLITZ! Using his heat vision, Superman reprograms the android children so they save him from the paralyzing seawater. Later, back on Earth, Muto challenges Superman again, but Superman creates a super-electric discharge to open a space-warp to Muto’s dimension and the villain is drawn home. With Superman gone in space on a Justice League adventure, Supergirl must stop Braniac when he comes to Earth to kill Superman.