"Game of Thrones" Season 6, Episode 9 is titled "Battle of the Bastards." The episode focuses on two major battles: the Battle of the Bastards between Jon Snow and Ramsay Bolton, and the Battle of Meereen between Daenerys Targaryen and the Masters of Slaver's Bay.
In the North, Jon Snow and Sansa Stark gather an army to reclaim Winterfell from Ramsay Bolton. However, their army is vastly outnumbered by Ramsay's, and Jon is forced to face Ramsay alone in a brutal one-on-one battle. With the help of a timely arrival from Littlefinger and the Knights of the Vale, Jon ultimately emerges victorious, and Ramsay is killed.
In Meereen, Daenerys Targaryen and her army of Unsullied and Dothraki face off against the Masters of Slaver's Bay. With the help of her dragon, Drogon, Daenerys is able to defeat the Masters and reclaim control of Meereen.
In King's Landing, Cersei Lannister continues her efforts to solidify her power, and forms an alliance with Euron Greyjoy, who offers to bring her the captured Sand Snakes.
In the Riverlands, the Hound and the Brotherhood Without Banners continue their journey, and come across the burning remains of a sept.
The episode ends with Daenerys setting sail for Westeros, and Jon being declared the King in the North.
In summary, "Battle of the Bastards" is the ninth episode of "Game of Thrones" Season 6, and focuses on two major battles: the Battle of the Bastards between Jon Snow and Ramsay Bolton, and the Battle of Meereen between Daenerys Targaryen and the Masters of Slaver's Bay. Jon emerges victorious, Daenerys reclaims Meereen, and Cersei forms an alliance with Euron Greyjoy. The episode ends with Daenerys setting sail for Westeros and Jon being declared the King in the North.