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  ===Casting===
  Members of Sigur Rós appeared in the episode.
  The episode has the introduction of new recurring cast members Roger Ashton-Griffiths as Mace Tyrell, the Lord of Highgarden, and Elisabeth Webster as Walda Frey, Roose Bolton's new bride. Young actor Dean-Charles Chapman takes over the role of Tommen Baratheon as of this episode. In a cameo appearance, the Icelandic band Sigur Rós performed their rendition of "The Rains of Castamere" at King Joffrey's wedding, and again during the credits.
  With this episode, Iwan Rheon (Ramsay Snow) is promoted to series regular.