The best part of watching Game of Thrones isn't seeing the dragons breathe fire all over their enemies, or even the grueling battle episodes the show has gotten so good at finessing. The most rewarding aspect of the show is watching the interpersonal relationships between all of the most dynamic characters grow and change over the seasons. In Season 8, we have families aligned for the first time who were sworn enemies in Season 1, and characters who have vowed to kill each other prepared to fight together against a common foe. No relationship is as fascinating and complex as the one between Jaime Lannister and Brienne of Tarth -- which it was fitting that last night's episode was titled just for her.
HBO has been hiding the episode titles until after each episode airs to curb speculation and spoilers (which is why last night’s was just called "Episode 69" at first). The real title, "A Knight of the Seven Kingdoms," is a sly reference to George R.R. Martin's "Tales of Dunk and Egg" series of novellas -- The Hedge Knight (1998), The Sworn Sword (2003), and The Mystery Knight (2010) -- which were published together in a single edition called A Knight of the Seven Kingdoms. The books follow the adventures and misadventures of "Dunk," the future Ser Duncan the Tall, Lord Commander of the Kingsguard and one of the most famous knights ever (and one of Martin's favorite characters), and his squire "Egg," or Aegon V Targaryen, nearly a century before the events of A Song of Ice and Fire.
But it's not just a one-and-done reference. In A Feast for Crows, the fourth book in Martin's series, Brienne has her shield painted with Dunk's coat of arms, copied from a shield in her father's armory. This turned out to be a handy little Easter egg when Martin confirmed during a fan appearance in 2016 that Brienne is in fact a descendant of Ser Duncan (and probably got all of his tall genes). The parallels between Brienne and her squire Pod and Dunk and his squire Egg were all there, and after Sunday's episode, Brienne is even closer to her long-lost relative than ever.