Guest Stars Anton Lesser as Qyburn Rupert Vansittart as Lord Yohn Royce Richard Dormer as Lord Beric Dondarrion Richard Rycroft as Maester Wolkan James Wilson as Little Sam William Wilson as Little Sam Staz Nair as Qhono Paul Kaye as Thoros of Myr Tom Hopper as Dickon Tarly Tim McInnerny as Lord Robett Glover James Faulkner as Randyll Tarly Jim Broadbent as Archmaester Marwyn Kevin Eldon as Camello Julian Firth as Citadel Maester Laurence Spellman as Goldcloak Guard Philip O'Sullivan as Citadel Maester Adele Smyth-Kennedy as Littlefinger's Spy Uncredited Vladimir Furdik as The Night King