Action Comics #251
When Clark Kent drinks Prof. Vance's life-extending vitamin serum, which contains particles of Kryptonite, it ages him to about 70 years old. Since his robots won't respond to his aged voice, Superman must fulfill his duties as the Old Man of the Sea, Santa Claus, and Father Time so that no one realizes that Clark Kent is Superman.
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When Clark Kent drinks Prof. Vance's life-extending vitamin serum, which contains particles of Kryptonite, it ages him to about 70 years old. Since his robots won't respond to his aged voice, Superman must fulfill his duties as the Old Man of the Sea, Santa Claus, and Father Time so that no one realizes that Clark Kent is Superman.
Plot details indexed by the Grand Comics Database (CC BY-SA).