George R.R. Martin’s best-selling book series “A Song of Ice and Fire” is brought to the screen as HBO sinks its considerable storytelling teeth into the medieval fantasy epic. It’s the depiction of two powerful families — kings and queens, knights and renegades, liars and honest men — playing a deadly game for control of the Seven Kingdoms of Westeros, and to sit atop the Iron Throne. Martin is credited as a co-executive producer and one of the writers for the series, whose shooting locations include Northern Ireland, Malta, Croatia and Spain.