Justice League of America, Vol. 1

Invading Superman's Fortress of Solitude in one of his light-disguises, Dr. Light uses Superman's store of amnesium and one of his special weapons to pluck the knowledge of their secret identities from the heroes' minds and cause them to believe that each is actually the other. Green Arrow thinks he is Ray Palmer, Batman thinks he is Oliver Queen, Green Lantern believes himself to be Barry Allen, the Atom becomes Hal Jordan, and Flash assumes the identity of Bruce Wayne.

Only Aquaman, who has no secret identity, and the invulnerable Superman are unaffected, and they set out to rescue their comrades from Dr. Light's death-traps. In their confused states, the heroes are easy victims, but Superman and Aquaman (working undercover under his real name, Arthur Curry) extricate them from their difficulties. Returning to the Fortress, they fight a pitched battle against Dr. Light before overcoming him. The amnesium is destroyed, and the heroes agree to reveal their true identities to each other, to prevent the recurrence of this dilemma.