The first episode contains previously unseen footage revealing the camera tricks behind Arya's face-changing transformation into Walder Frey and the breathtaking Spanish landscapes that served as the backdrop for Daenerys' home of Dragonstone.
From gruesome greyscale to female powerhouses to choreographing a crew of pirates, Emilia Clarke, Peter Dinklage, Lena Headey and other cast and crew give an inside look at the second episode in Season 7.
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