Edmure Tully - Played by Tobias Menzies, also appeared in The Thick of It as Simon Weir
Grand Maester Pycelle - Julian Glover also appeared in Doctor Who City of Death as Scaroth, Count Scarlioni and Captain Tancredi
Viserys Targaryen - Played by Harry Lloyd who also appeared in Doctor Who, The Family of Blood/Human Nature as Baines
Grand Maester Pycelle - Played by Julian Glover. He also appeared in both The Empire Strikes Back as General Maximillian Veers and in Indiana Jones and the Last Crusade as Walter Donovan.