Action Comics (1938-) #320

“THE THREE SUPER-ENEMIES!” Clark Kent summons Hercules, Samson and Atlas to help save Metropolis in an emergency when he is otherwise occupied, but does not suspect that he has summoned the evil counterparts of these heroes from a parallel Earth. Plus, “THE MAN WHO BROKE SUPERGIRL’S HEART!” Lord Bronar and his henchman Skoll, two villains who rule a planet of android slaves, scheme to steal Supergirl's powers!