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  ===Critical reviews===
  "Kill the Boy" was received positively. Mike Hogan of ''Vanity Fair'' said that the creative team "just keeps cranking up the tension," while Joshua Yehl of ''IGN'' rated the episode 8.4/10 and wrote that the season "reaches its midway point with refreshed plot-lines and a rare moment of fantasy beauty." Christopher Orr of ''The Atlantic'' called the episode "superb" and described it as "crisply written, directed and performed." On Rotten Tomatoes, all 29 critic reviews collected were positive. The site gave the episode an average rating of 8.2 out of 10.