A sharp-eyed fan (thanks, Jonas!) stumbled across the fact that Mero of Braavos, called the Titan’s Bastard, has been cast. The role of the notoriously brutal and untrustworthy sellsword captain is to be played by Mark Killeen, according to his CV. He also lists director Michelle McLaren as the director of the episode or episodes he appears in. As we’ve previously reported, MacLaren directed episodes 7 and 8 of the third season.
So, the notable sellswords Daenerys meets in Slaver’s Bay are largely accounted for. Is Brown Ben Plumm also in the cards? We’re pretty sure that if he does appear, it’ll be in the fourth season or even later, but you never really know.