Cover: Mike Sekowsky & Murphy Anderson

Justice League of America #21

Aug 1963 · DC · 0.12 USD

📊 ~90,009 copies sold its debut month

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“Crisis on Earth-One!”

In "Crisis on Earth-One!", the Justice League of America faces a cunning scheme as three Earth-1 villains team up with three Earth-2 counterparts to commit crimes and vanish across dimensions. With the League trapped in their own headquarters, they call upon the older heroes of the Justice Society of America—switching places to battle the threat. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Bernard Sachs and lettering by Gaspar Saladino, this 1963 classic features cover art by Mike Sekowsky and Murphy Anderson.

writer Gardner Fox · artist Mike Sekowsky · inker Bernard Sachs · letterer Gaspar Saladino · cover Mike Sekowsky, Murphy Anderson

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Full credits

writer Gardner Fox

artist Mike Sekowsky

inker Bernard Sachs

letterer Gaspar Saladino

cover pencils Mike Sekowsky

cover inks Murphy Anderson

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

3 villains each from Earth-1 and Earth-2 hatch a plot to commit crimes, then hide out on the other Earth. To ensure their success, the villains of Earth-1 mystically trap the Justice League of America in their headquarters. But the Justice League of America summons the Justice Society of America and switches places with them.

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