"Blackout, Part 2 of 5: Missing in Action"
Triangle 1991-38. Continued from Adventures of Superman (1987) #484 and continues in Superman: The Man of Steel #6.
Power loss to the entire city of Metropolis caused by Professor Hamilton leads to riots and looting. Meanwhile, Superman and Mr Z find themselves lost in the southern Pacific with no memory of who they are or how they arrived at their current location. Lex Luthor "the Second" arrives in Metropolis.