An organization of teen-aged crime-fighters and adventurers -
representing Earth and more than a score of far-flung planets and
consisting, all in all, of several dozen active members, honorary
members, and reservists - each of whom possesses some unique
super-power distinct from those possessed by every other member of the
group. The Legion makes its headquarters in the city of Metropolis in
the thirtieth century A.D., where it is primarily active.
Among the Legion's many members are Bouncing Boy, Brainiac 5,
Chameleon Boy, Cosmic Boy, Element Lad, the Invisible Kid, Mon-El, Lightning Lad, Saturn Girl, Sun Boy, and
Triplicate Girl. When Superman was a teenager (see
Superboy), he journeyed into
the future and joined the Legion. Supergirl is also a member of the Legion.
Jimmy Olsen is an honorary member of
the Legion under the name Elastic Lad. The Legion's "animal branch"
is known as the Legion of Super-Pets. The Legionnaires are fully
aware that Clark Kent is secretly Superman.
Since Superman has the power to travel in time, it is possible for him
to journey to the thirtieth century A.D. to visit the Legion either
during the period when they are teen-agers or during the period when
they are adults. By the same token, since the Legionnaires are able
to time-travel also, it is possible for them to return to the
twentieth century to visit Superman either as teen-agers or as
adults. For this reason, the Legionnaires appear in the chronicles
sometimes as teen-agers and sometimes as adults. And as adults, the
Legionnaires often have different names from the ones they employed as
teen-agers. The adult Cosmic Boy is called Cosmic Man the adult
Lightning Lad is called Lightning Man; the adult Saturn Girl is called
Saturn Woman; and so on.