Continuity mistake: In this episode, Kings Landing is shown as sitting on flat, plain-like terrain. In previous seasons, it was shown surrounded by water and mountains covered lush greenery.
Continuity mistake: In order to save him from Drogon's fire at the very end of the episode Jaime is thrust by Bronn into water about 40 feet deep. This shouldn't have been possible especially after Jamie is shown galloping on his horse along the watery beach side just moments before.
Continuity mistake: This is when the family is watching Bran practicing archery. The round target on the left has a large hole on the bottom right side, presumably from a previous arrow. This hole moves around throughout the scene, most noticeably in the shot after Arya shoots an arrow right into the middle of the target. (00:10:40)