Cover: Curt Swan & George Klein

Action Comics #350

May 1967 · DC · 0.12 USD

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“The Secret of the Stone-Age Superman”

In "The Secret of the Stone-Age Superman," Superman journeys back to prehistoric times after Perry White uncovers a caveman skeleton clad in a Superman costume, only to find himself stranded when Earth's sun appears red and powerless in that era. Written by Otto Binder and illustrated by Wayne Boring, this 1967 classic blends adventure and mystery with a timeless twist, all rendered in the iconic style of Curt Swan on the cover and George Klein’s inks.

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writer Otto Binder · artist, inker Wayne Boring · letterer Joe Letterese · cover Curt Swan, George Klein

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Full credits

writer Otto Binder

artist, inker Wayne Boring

letterer Joe Letterese

cover pencils Curt Swan

cover inks George Klein

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

When Perry White discovers a caveman skeleton dressed in a Superman costume, Superman travels into the past to investigate, but is trapped in prehistoric times because Earth's sun is red in that era.

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