Cover: Curt Swan & Stan Kaye

Adventure Comics #290

Nov 1961 · DC · 0.10 USD

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“The Secret of the Seventh Super-Hero!”

In "The Secret of the Seventh Super-Hero!", the Bizarros’ bizarre celebration turns chaotic when their world is invaded by strange, animated blue kryptonite creatures—only to discover the invaders have a twisted sense of geometry. Written by Jerry Siegel and illustrated by John Forte, this 1961 Adventure Comics tale explores the unexpected dangers of imperfect duplicates, where even the most reliable defenses can fail. The cover by Curt Swan and Stan Kaye captures the surreal clash of worlds with their signature flair.

writer Jerry Siegel · artist, inker John Forte · cover Curt Swan, Stan Kaye

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Cast · 26 characters

Full credits

writer Jerry Siegel

artist, inker John Forte

cover pencils Curt Swan

cover inks Stan Kaye

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

The Bizarros celebrate when their world is invaded by animated blue kryptonite creatures, until the invaders try to make it round again. Then war breaks out. The blue kryptonite radiation was not blocked by regular lead suits, but is blocked by imperfect duplicates of the same lead suits.

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