1st Silver Age appearances of Hourman and Dr. Fate. Cover pencils by Mike Sekowsky, inks by Murphy Anderson. Crisis on Earth-One!, script by Gardner Fox, pencils by Mike Sekowsky, inks by Bernard Sachs; 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 JLA in their headquarters; But the JLA summons the JSA and switches places with them.
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