Justice League of America #220

In "The Doppelgänger Gambit," the Justice League of America confronts a shocking twist in the legacy of the Canary, as Earth-One's Johnny Thunder unveils the hidden past of the second Canary—her origins tied to Earth-Two and a desperate act by the Earth-One Superman to save her life. Written by Roy Thomas and illustrated by Chuck Patton, with inks by Romeo Tanghal and Marcos, this pivotal 1983 issue explores identity, memory, and the cost of heroism, all anchored by a powerful emotional core. The story's bold narrative is framed by George Pérez’s striking cover art, capturing the tension between the two versions of the character.