Before the fight between Euron and Jaime begins, Euron says "If you kill another king before you die... they'll sing about you forever"; after he is fatally stabbed by Jaime, Euron yells "Another king for you!" - referring to Aerys, the first king whom Jaime killed. See more

Goofs

Tyrion states that "if the city surrenders, they'll ring the bells and raise the gates," yet in Game of Thrones: Blackwater , Davos states "I've never known bells to mean surrender," and Lord Varys also says the bells ring for "a city under siege," disproving that bells signal Kings Landing's surrender, and subsequently the title of the episode itself. See more