Guest Stars Hafþór Júlíus Björnsson as Ser Gregor Clegane Anton Lesser as Qyburn Pilou Asbæk as Euron Greyjoy Bronte Carmichael as Martha Marc Rissmann as Harry Strickland Isaac Heslip as King's Landing Boy Alexis Raben as Alanna Adam Devereux as Scorpion Gunner Matthew Wolf as Guardian of the Gate Frank Blake as Northern Sentry Thomas Martin as Gate Guard Jack Morgan as TBD Rosie McClelland as Flea Bottom Mother Louis McCartney as TBD Caitlin Pharro as Scared Little Girl Luna Kalo as TBD Brian Patrick Kennedy as TBD Hayley McQuillan as Scared Older Girl Nicky Harley as Terrified Mother Jim Tighe as Lannister Captain Mairi Hawthorn as Woman in the Alley Derek Dubery as King's Landing Father Oliver Devoti as Northerner in the Alley Ryan McKen as Unsullied Guard Luke McQuillan as Ferocious Northerner Tipper Seifert-Cleveland as Nora's Daughter Laura Elphinstone as Nora Owen Whitelaw as Owen