Cersei's handmaiden appears wearing short cut hair and a high-collared black robe. According to Michele Clapton, the costume designer of the series, fashion of Westerosi high society follows a trickle-down pattern; after Cersei adopted dark, high-collared gowns, her household would follow suit, and no woman would show up Cersei by wearing longer hair than hers, after the Faith Militant forcibly sheared it before her walk of atonement.
The first appearances in the series of Highgarden, the castle seat of House Tyrell, and Casterly Rock, seat of House Lannister. This also marks the first appearance of the regional capitals of both the Reach and the Westerlands, making Storm's End (Stormlands) and Sunspear (Dorne) the only capitals that haven't been depicted (Storm's End was supposed to be in the background in Garden of Bones (2012), but budget limitations prevented this; the Dorne scenes in season 5 take place in the Water Gardens, a private residence near Sunspear).
The episode title officially refers to the title held by the royal executioner, or, in the broader sense, the monarch's judicial authority. In the context of the episode, it refers to Cersei exacting her revenge upon some of her enemies.
Daenerys asking Tyrion whether he is trying to pass personal statements as ancient wisdom is a callback to episode Oathbreaker (2016), where he stated to Missandei that a wise man once said that a true history of the world is a history of great conversations in elegant rooms. When asked who that wise man was, he replied "Me, just now".
The first time Jon and Tyrion share scenes since the first season. The last time they saw each other, Tyrion was indeed "pissing off the edge [of the Wall]", which occurred in Lord Snow (2011); Jon also refers to the conversation they had in The Kingsroad (2011), where Tyrion dismissed the importance that Jon placed on the Night's Watch keeping the rest of Westeros safe, scoffing that the Watch protects the realm from "grumpkins and snarks and all the other monsters your wet nurse warned you about". The reason that Tyrion seems less skeptic now is because Jeor Mormont had warned the Small Council of the undead in The Night Lands (2012); Tyrion had met Mormont, and knew him as a man who would not lie about such matters.