Game of Thrones - Season 7, Episode 4 Synopsis
 

Episode 7 - 4
Title: "The Spoils of War"
Directed by Matt Shakman
Written by David Benioff & D. B. Weiss
Original Air Date - August 6, 2017

Arya returns to Winterfell and reunites with Sansa. She later spars with Brienne, impressing her and unnerving Sansa with her exceptional fighting skills. Bran bids Meera an unemotional farewell as she prepares to head home, divulging he is no longer the boy she accompanied through the North. Littlefinger presents Bran with the dagger his would-be assassin used. Bran later gives it to Arya. Cersei assures the Iron Bank a full repayment of her debt, as a wagon train carrying gold from Highgarden travels to King's Landing. In a cave filled with dragonglass, Jon reveals ancient wall paintings to Daenerys depicting the First Men and the Children of the Forest joining forces against the undead. Later, Daenerys learns that the Lannister forces have captured Highgarden and the attack on Casterly Rock was a diversion. Ignoring Tyrion's protests, Daenerys rides Drogon as the Dothraki cavalry launches a surprise attack on the Lannister army, decimating it and capturing its remaining forces. Drogon is wounded when Bronn fires a bolt from Qyburn's new scorpion ballista weapon, but he and Daenerys land safely. Jaime's desperate charge on horseback at a vulnerable Daenerys is thwarted by Drogon spewing fire. Bronn tackles Jaime into the river, saving him.

Source: https://en.wikipedia.org/wiki/Game_of_Thrones_(season_7)