One of the most heartbreaking moments of the Season 4 finale was when Dany shut away her precious, baby-murdering dragons. Now we've seen her return, and even by her own admission, she can't control her dragons. They nearly barbecue her in their airless tomb. But how, as her lover Daario points out, can she be The Mother of Dragons without them? One of the main promotional posters for Season 5 shows Tyrion facing off with one of them, and they feature heavily in the teaser, so they must be released at some point – but when? And at what cost?