Adventures of Superman #484
In "Blackout [Part 1]," Superman faces a cunning new foe in Mr. Z, who manipulates Professor Hamilton into setting a trap that backfires spectacularly—knocking out Metropolis’s power grid and leaving both hero and villain with amnesia. Written by Dennis Janke and Jerry Ordway, with art by Tom Grummett and inks by Doug Hazlewood, this pivotal issue kicks off a mystery that blurs identity and memory, all under Jerry Ordway’s striking cover.
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Mr. Z uses Professor Hamilton to set a trap for Superman. When Hamilton tries to free Superman from the trap, he blows the power grid in Metropolis, and causes Mr. Z and Superman to get amnesia.
Plot details indexed by the Grand Comics Database (CC BY-SA).