Superboy was the featured series in Adventure Comics in the 1950s. In Adventure Comics #247 (April 1958) by writer Otto Binder and artist Al Plastino, Superboy was met by three teenagers from the 30th century: Lightning Lad, Saturn Girl, and Cosmic Boy, who were members of a "super-hero club" called the Legion of Super-Heroes. Their club had been formed with Superboy as an inspiration, and they had time travelled to recruit Superboy as a member. After a series of tests, Superboy was awarded membership and returned to his own time. Although intended as a one-off story focusing on Superboy, the Legion proved so popular that it returned for an encore in Adventure Comics #267 (December 1959). In this story, Lightning Boy had been renamed Lightning Lad, and their costumes were very close to those they wore throughout the Silver Age of Comic Books. The Legion's popularity grew, and they appeared in further stories in Adventure Comics, Action Comics, and other titles edited by Mort Weisinger over the next few years. The ranks of the Legion, only hinted at in those first two stories, was filled with new heroes such as Chameleon Boy, Invisible Kid, Colossal Boy, Star Boy, Brainiac 5, Triplicate Girl, Shrinking Violet, Sun Boy, Phantom Girl, and Ultra Boy. Even Supergirl was recruited as a member. In Adventure Comics #300 (September 1962), the Legion received their own regular feature, cover-billed "Superboy in 'Tales of the Legion of Super-Heroes'". While they would share space with Superboy solo stories for a couple of years, they eventually displaced Superboy from the title entirely as their popularity grew. Lightning Lad was killed in Adventure Comics#304 (January 1963) and revived in issue #312 (September 1963). It was the Adventure Comics run which established the Legion's general workings and environment.
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