Among Wednesday’s best bets on TV:
On “Arrow,” Season 3’s new villain is Vertigo, who has nothing to do with the rock band U2 (which is, apparently, the villain of anybody with an iTunes account). 8 p.m., CW
“American Horror Story: Freak Show”: Season 4 of Ryan Murphy’s Mercury Theater of the Damned premieres with a gaggle of sideshow performers. 10 p.m., FX
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