"Oathkeeper" was written by Bryan Cogman based on A Storm of Swords. Reviewer Walt Hickey of FiveThirtyEight notes that the episode "contained the final scene of Jaime Lannister’s ninth "Storm of Swords" chapter.
Bryan Cogman wrote "Oathkeeper," which is based on George R.R. Martin's A Storm of Swords. Reviewer Walt Hickey of FiveThirtyEight mentions that the episode contains the final scene from Jaime Lannister’s ninth "Storm of Swords" chapter.