Published: April-May 1958
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In a future where Earth is ravaged by the after-effects of an atomic war, scientists decide to change the past so the atom bomb was never created.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Page count added by Ken Rowand.
Story Featuring Space Cabbie [Space Cabby]
Information for this sequence from Arthur Lortie. Sequence order corrected by Ken Rowand.
Story Featuring Challengers of the Unknown
House ad for Challengers of the Unknown #1.
Shows a differently colored cover than the actual printed issue. Sequence added by Ken Rowand.
Story Featuring Peter Porkchops
This sequence ran in DC Comics dated April 1958 and January 1962 per story title search at comics.org.
Text article with masthead illustration. Sequence added by Bill Devine.
Back cover.
Inside back cover.
Inside front cover.
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