'Game of Thrones' season three is set to return to Sky Atlantic on April 2 in Ireland and the UK, just two days after its US premiere on March 31. The HBO fantasy drama has filmed in every county in Northern Ireland over the course of three seasons. Watch actors Maisie Williams, who plays Arya Stark, Emilia Clarke who plays Daenerys Targaryen, executive producer Frank Doelger and series creator David Benioff as they discuss filming in Northern Ireland and other locations in this behind-the-scenes video.