Action Comics swap bodies with a gorilla and his strip was renamed Congorilla. The introduction of Supergirl by Otto Binder and Al Plastino occurred in issue #252 (May 1959). Following this debut appearance, Supergirl adopted the secret identity of an orphan "Linda Lee" and made Midvale Orphanage her base of operations. In "Action Comics" #261 (February 1960), her pet cat Streaky was introduced by Jerry Siegel and Jim Mooney. Supergirl joined the Legion of Super-Heroes in issue #276 and acted for three years as Superman's "secret weapon," until her existence was revealed in "Action Comics" #285 (January 1962). In the view of
Action Comics 1 the Century" commemorative stamp series along with a "First Day of Issue" cancellation. It was sold by the U.S. Postal Service, shrinkwrapped, for $7.95. The complete issue, save for the inside front, inside back, and outside back cover, was reprinted in 2000 as part of DC Comics' "Millennium Edition" series of reprints of famous DC comics. The 1988, 1998 and 2000 reprints were published to the page-size standard of the 1988–2000 period, and not the larger page size utilized by "Action Comics" in 1938. In early 2011, DC Comics announced plans to reboot and reset 52 of its ongoing titles,