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  ===Title sequence===
  The series' title sequence was created by production studio Elastic for HBO. Creative director Angus Wall and his collaborators received the 2011 Primetime Emmy Award for Main Title Design for the sequence, which depicts a three-dimensional map of the series' fictional world. The map is projected on the inside of a sphere which is centrally lit by a small sun in an armillary sphere. As the camera moves across the map, focusing on the locations of the episode's events, clockwork mechanisms intertwine and allow buildings and other structures to emerge from the map. Accompanied by the title music, the names of the principal cast and creative staff appear. The sequence concludes after about 90 seconds with the title card and brief opening credits indicating the episode's writer(s) and director. Its composition changes as the story progresses, with new locations replacing those featuring less prominently or not at all.