PUBLISHED: SEPTEMBER-OCTOBER 1956 DC COMICSSHOWCASE #4 "MYSTERY OF THE HUMAN THUNDERBOLT!". KEY ATTRIBUTES:FIRST APPEARANCE AND ORIGIN OF THE SILVER AGE FLASH (BARRY ALLEN) ;FIRST APPEARANCE OF IRIS WEST ;FIRST APPEARANCE OF THE TURTLE (VILLAIN, AS THE TURTLE MAN) ;THE BIRTH OF THE SILVER AGE OF COMICS.
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