THE FLASH - SEASON FIVE
WHAT'S PAST IS PROLOGUE
EPISODE NUMBER - 508
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WHAT'S PAST IS PROLOGUE
EPISODE NUMBER - 508
Barry and Nora embark on a risky plan to stop Cicada by traveling to key moments in the past, gathering pieces of a weapon to use against him -- putting them face-to-face with the Flash's most dangerous enemies.
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