Guest Stars Daniel Portman as Podrick Payne Ben Crompton as Eddison Tollett Owen Teale as Alliser Thorne Diana Rigg as Lady Olenna Tyrell Brenock O'Connor as Olly Eugene Simon as Lancel Lannister Nell Tiger Free as Princess Myrcella Baratheon Brian Fortune as First Builder Othell Yarwyck Jonathan Pryce as High Sparrow Peter Vaughan as Maester Aemon Rosabell Laurenti Sellers as Tyene Sand Michael Condron as Bowen Marsh Keisha Castle-Hughes as Obara Sand Jessica Henwick as Nymeria Sand Hannah Waddingham as Septa Unella Joel Fry as Hizdahr zo Loraq Deobia Oparei as Areo Hotah Enzo Cilenti as Yezzan zo Qaggaz Adewale Akinnuoye-Agbaje as Malko Jonathan Byrne as Brant Ian Lloyd Anderson as Derek