Superman #220

In "Hint: This Man Is Not Superman!", Superman wakes on a beach wearing the Red Flash's costume, with no memory of how he got there—just like the real Red Flash, who’s now sporting Superman’s suit and equally lost. With both heroes convinced they’re the other, confusion reigns as Clark Kent, Lois Lane, Jimmy Olsen, and Perry White try to make sense of the mix-up. When the two men finally meet, they must piece together the mystery behind their swapped identities before the truth slips away again.

In "Part II: Who Stole My Super-Powers?", Superman wakes on a beach in the Red Flash's costume, with no memory of how he got there—and the Flash, equally confused, is wearing Superman's suit. With both heroes convinced they’ve swapped identities, the mystery deepens as they struggle to piece together what happened. When they finally meet by chance, the two must work together to uncover the truth behind their shared amnesia and the strange costume swap.

In "Part III: Which of Us Is Which?", Superman and the Flash find themselves trapped in a mystery of mistaken identity—each wearing the other’s costume and struggling to remember who they truly are. With no clear answers and their memories shattered, the two heroes must piece together the truth before the alien plant threat grows beyond control.