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  ===Casting===
  Ciarán Hinds joins the series as Mance Rayder
  "Valar Dohaeris" introduces the Irish actor Ciarán Hinds as the Wildling leader and Night's Watch deserter Mance Rayder, one of the latest Season 3 roles to be cast. The producers explained that casting Mance was a great challenge because he was someone who had become "King beyond the Wall" not by birthright but by convincing all the tribes to unite under his leadership. They had to find an actor with the charisma required to portray this. Unusual for a production such as ''Game of Thrones'', the first scene Hinds filmed was the first one where his character appears: the meeting with Jon Snow at his tent.
  The season premiere also marks the first appearance of guest stars Kristofer Hivju as the Wildling Tormund Giantsbane, Nathalie Emmanuel as the slave Missandei, and Anton Lesser as the wounded prisoner Qyburn. The three castings were announced at San Diego Comic-Con in July 2012.
  With this episode, Rose Leslie (Ygritte) and Oona Chaplin (Talisa) are promoted to series regulars, after guest starring in the second season. After being absent for the entire second season, Ian McElhinney returns as Ser Barristan Selmy. Actor Ian Whyte, previously cast as a White Walker in the first season, was recast as the huge Ser Gregor Clegane in the second and appears in the episode as the giant seen in the wildlings camp.