This week's penultimate episode of Game of Thrones opens with the line of the season: "Are you sure about this?" Spoken by Lady Cat, to her son Robbo, who has followed the path of honor to the edge of a nasty cliff.

Robbo wants to set up a last-ditch lateral move, attacking the real seat of power in Westeros: Casterly Rock, the home of the Lannisters. It's a ballsy move, and...
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