On Game of Thrones, Conleth Hill plays the scheming "spider" and Master of Whisperers, Lord Varys, a character whose appeal owes everything to the North Irish actor's nuanced, stage-trained performance. The eunuch is neither a bloodthirsty warrior nor a highborn noble. Instead, he is the Game's canniest player. His mercurial presence, insinuating line delivery, and often-inscrutable and debated loyalty to "the realm" has, over the course of six seasons with a seventh due over the summer...