Guest Stars Nathalie Emmanuel as Missandei Daniel Portman as Podrick Payne Jacob Anderson as Grey Worm Julian Glover as Grand Maester Pycelle Hannah Murray as Gilly Ian McElhinney as Ser Barristan Selmy Finn Jones as Ser Loras Tyrell Ed Skrein as Daario Naharis Diana Rigg as Lady Olenna Tyrell Ian Beattie as Ser Meryn Trant Paul Bentley as The High Septon Ross Mullan as White Walker Ramon Tikaram as Prendahl na Ghezn Talitha Luke-eardley as Yunkai'i Whore Mark Killeen as Mero