HBO has unveiled the first official trailer for Season 2 of Game of Thrones, reeling it before Boardwalk Empire on Sunday. Check out the trailer below!

The new clip, titled "The Cold Winds Are Rising," introduces Stannis Baratheon (Stephen Dilliane), the brother of the late King Robert (Mark Addy) who notes that there were no "true-born heirs" and that the "fight for the Iron Throne" is beginning.

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The second season of Game of Thrones premieres its second season in April on HBO.

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