Big things are speeding towards "The Flash" in the back half of season two. The latest trailer heralds King Shark's return to Central City as well as the Diggles' visit on A.R.G.U.S.' behalf. Additionally, Earth-2 Barry encounters his speedster self from Earth-1, Iris' new boss demands the Flash be outed as having gone rogue, Barry gets imprisoned in the Pipeline and Zoom makes a terrifying entrance in STAR Labs.
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