Game of Thrones Season 2 Episode 9, Blackwater Guide. Original air date: May 27, 2012 (2012-05-27).
Stannis finally begins his assault on King’s Landing and Tyrion and the Lannisters must fight for their lives on the Blackwater Rush. The Lannisters’ control of King’s Landing is in peril when Stannis’ fleet launches an all-out assault.
Boy-king Joffrey Baratheon’s days on the Iron Throne appear to be numbered as Stannis lays claim to his late brother Robert’s realm with a naval assault on King’s Landing. The realities of all-out war leave the young tyrant reeling, and it is left to his sharp-witted uncle Tyrion to launch a defensive strategy that could save his family and decide the fate of the seven battle-scarred kingdoms of Westeros.