If there's one compliment that can be paid to the braintrust behind **The Flash ** , Arrow and the upcoming Legends of Tomorrow , it's that they aren't afraid of taking on the tasks of universe-building that would frighten off other production teams. It's because of that fact that this week's two-part crossover between their headlining stars begins with full reveal of not one, but three new DC Comics characters (on top of continuing each show's storylines). The result is an episode dripping with fan service - but one that ultimately has far too many masters to serve to ever hope of doing it w
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