Cover: Neal Adams & Dick Giordano

Action Comics #400

May 1971 · DC · 0.15 USD

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“My Son... Is He Man or Beast?”

In Action Comics #400, Superman takes on the unexpected role of guardian to Gregor, a grieving teen whose life was irrevocably altered by a tragic accident involving the Man of Steel. Written by Leo Dorfman and illustrated by Curt Swan with inks by Murphy Anderson, the story explores the evolving bond between hero and troubled youth as Gregor struggles to master his unpredictable transformations. The emotional journey is captured in a powerful cover by Neal Adams, with inks by Dick Giordano, making this a standout issue in Superman’s legacy.

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writer Leo Dorfman · artist Curt Swan · inker Murphy Anderson · letterer Ben Oda · cover Neal Adams, Dick Giordano

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Cast · 3 characters

Brainiac Supergirl Superman

Full credits

writer Leo Dorfman

artist Curt Swan

inker Murphy Anderson

letterer Ben Oda

cover pencils Neal Adams

cover inks Dick Giordano

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

Superman becomes the guardian of Gregor, a teenage boy, when the boy's scientist father dies. However, Gregor hates Superman for accidentally causing him to become a genetic freak who changes into animals without warning. Supermen gradually trains him to control his powers and their relationship changes, until finally Gregor sacrifices his life to save others.

Plot details indexed by the Grand Comics Database (CC BY-SA).