William McElroy was an Egyptologist at Yale University. After he suffered a blow to the head during a student riot, McElroy suffered amnesia. His subconscious created a new personality to take over, the reincarnation of King Tut. Batman and Robin discovered each strike to his head changes his personality back and forth. Tut was one of the 14 criminals freed from Gotham State Penitentiary by Robin and Catwoman to battle Batman and his Replica Ray clones. During the fight at Gotham Palace, King Tut didn't waste much time laying into clones until he was kicked into the seating area. In the aftermath, he was rearrested and returned to the penitentiary.

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