Rip Hunter... Time Master #20

DC's time-traveling adventurer lands in one of history's darkest chapters in this 1964 entry in the series, with cover art by Bill Ely depicting a tense confrontation: a figure resembling Adolf Hitler gloats alongside a blond man in green while a second green-suited figure is restrained by two Nazi soldiers, the speech bubbles framing a dramatic accusation of betrayal. The cover's teaser — "What Was Adolf Hitler's Greatest Secret?" — sets up a mystery that must have felt genuinely daring for a Comics Code–approved book of the era. Rip Hunter's time-spanning adventures rarely felt higher-stakes than this.