"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 authored "Oathkeeper," derived from A Storm of Swords. Reviewer Walt Hickey of FiveThirtyEight notes that the episode encapsulates the concluding portion of Jaime Lannister’s ninth "Storm of Swords" chapter.