Dinklage appears as Tyrion Lannister in the fifth episode of the second season, The Ghost of Harrenhal. The Small Council in King’s Landing receives word of the death of Renly Baratheon, one of the five rivals for the kingship of Westeros. Tyrion predicts that an attack is imminent on King’s Landing by Stannis Baratheon, Renly’s older brother and a challenger to the Iron Throne. He discovers that Queen Regent Cersei Lannister, played by Lena Headey, has prepared a magical substance known as wildfire, which could devastate an attacker but could also burn the city. He orders the pyromancer who prepared to substance to report to him on defense plans.