Guest Stars Bill Paterson as Lord Lyman Beesbury Gavin Spokes as Lord Lyonel Strong Luke Tittensor as Ser Arryk Cargyll David Horovitch as Grand Maester Mellos Elliott Tittensor as Ser Erryk Cargyll Steffan Rhodri as Lord Hobert Hightower Julian Lewis Jones as Lord Boremund Baratheon Andrew Bicknell as Dragonkeeper Gary Raymond as High Septon Nova Foueillis-Mosé as Lady Laena Velaryon (12-years-old) Siân Brooke as Queen Aemma Arryn Michael Carter as King Jaehaerys I Targaryen Garry Cooper as Ser Ryam Redwyne Mirjam Germann as Dragonkeeper Acolyte Matthew Carver as Laenor Velaryon John Arnedo as Gargantuan Brute Mikhail Sen as Mickon David Cann as Dragonkeeper Rhys Parry Jones as Master of Revels Frankie Wilson as Captain Randyll Barret David Hounslow as Lord Rickard Stark