Myranda reveals that Violet (Stephanie Blacker), the other girl who seduced Theon in The Bear and the Maiden Fair (2013) just before he was castrated, has been killed by Ramsey because she got pregnant. This may be an in-joke, referring to the fact that Violet was supposed to be the girl hunted and killed by Ramsey's dogs in The Lion and the Rose (2014), but Blacker could not reprise her role due to her real-life pregnancy. A new character called Tansy was written, played by Jazzy De Lisser; even though Myranda claims that Ramsay got bored with her, it was implied that Myranda herself requested Tansy's death because she got jealous of her presence. The third girl mentioned, Kyra the blacksmith's daughter, is mentioned in the book, but was killed just for sports, not because she talked too much. She never made an on-screen appearance.
The first time that the derogatory nickname of Olenna Tyrell "Queen of Thorns" is mentioned on-screen.
Most of the Hall of Faces was constructed as a practical set; only the highest parts were rendered as a CGI model. Approximately 550 plastic faces adorning the pillars were created by the art department from casts of around 32 unique and real people. Some of the models whose faces were cast included members of the crew (including showrunners David Benioff and D.B. Weiss) and their families.
This episode's title is the motto of House Martell, referring to the fact that Dorne was never successfully conquered: during Aegon Targaryen's conquest of Westeros, the Dornish successfully resisted any prolonged occupation via guerrilla warfare, so the Targaryens eventually gave up; Dorne later joined the other six kingdoms peacefully when the Martells intermarried with the Targaryen royal family. This is the third episode overall to take its title from the words of a noble house, following Winter Is Coming (2011) (House Stark) and Fire and Blood (2011) (House Targaryen).
The scene of Ramsay sexually assaulting Sansa was widely criticized for being graphic, and another negative example of how sexual violence against women was being used repeatedly as a narrative tool. However, the same scene in the books (with Jeyne Poole instead of Sansa) was considerably more graphic: Ramsay commands Theon to undress Jeyne, then to "prepare" her with his tongue (namely to perform oral sex), or else he will lose his tongue. Theon obediently does as he is told. Ramsay then molests Jeyne very brutally, and it is even implied that he forces her to do horrible things with one of his hunting dogs. Afterwards, the sounds of Jeyne's uncontrollable sobbing fill the halls of Winterfell, much to the discomfort of the Northern lords who are still attending the wedding. Sophie Turner, for her part, defended the scene, saying that she loved doing it for being so 'messed up', with Sansa finally having escaped Joffrey's clutches, and then ending up with a guy who is even worse. Turner also noted that audiences were much more sympathetic towards her character than before this episode.